Category Archives: AR-15

BREAKING: US Banned VEPR Due To Sanctions? Looks Like It!

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US Department of Treasury just added the manufacturer of the VEPR AK-variant to its sanction list. Keep reading…Source: TFB

VEPR banned

(TheFirearmsBlog.com) report by Patrick R., and others

Back in 2015 the Obama administration banned US companies from doing business with the Russian company Kalashnikov Concern, one of the popular manufacturers of Russian-made AK-type rifles. That’s why Kalashnikov USA exists now — they’re building rifles here in the US to circumvent the sanctions and continue selling to the American civilian firearms market.

The US Department Of Treasury released an update to the sanction list in connection to the Russian-Ukranian conflict, and it now that the Trump administration is expanding those sanctions to include another company, MOLOT-ORUZHIE, which means their VEPR line of firearms will be affected.

So why has MOLOT-ORUZHIE been placed on the sanctions list? The Department of Treasury cites the reason as due to a connection to Kalashnikov Concern. Some speculate that Kalashnikov Concern is poised to purchase the now-bankrupt MOLOT.

The text from the US Department of Treasury is posted below:

MOLOT-ORUZHIE, OOO (a.k.a. OBSHCHESTVO S OGRANICHENNOI OTVETSTVENNOSTYU ‘MOLOT-ORUZHIE’; f.k.a. OBSHCHESTVO S OGRANICHENNOI OTVETSTVENNOSTYU PROIZVODSTVENNO INSTRUMENT KACHESTVO), 135 ul. Lenina, Vyatskie Polyany, Kirov Obl. 612960, Russia; Registration ID 1094307000633 (Russia); Tax ID No. 4307012765 (Russia); Government Gazette Number 60615883 (Russia) [UKRAINE-EO13661] (Linked To: KALASHNIKOV CONCERN).

What does this mean for US gun owners?

For those who already own a VEPR firearm there’s no problem at all — your gun is 100% legal and will remain so. You can do with it what you want, whether that means selling it or keeping it.

Gun stores with VEPR firearms currently on the shelves should also be okay. Again, as long as no further money flows to MOLOT-ORUZHIE there’s no issue. Guns already in the country will be exempt from any sanctions.

Importers and distributors, however, may have a problem. Firearms “in transit” which have been bought and paid for will probably be okay, but they represent the end of the pipeline; no more new guns would be able to be purchased from MOLOT and imported into the country.

The end result is that we’ll soon see the flow of MOLOT-made VEPRs slow to a trickle and then stop completely. Prices will likely climb as supplies dwindle, but since there are other US-made AK-pattern options on the market, including those from the new Kalashnikov USA, there’s unlikely to be any real shortage of this style firearm. Those who have been eyeing that VEPR might be advised to grab one before supplies dry up, and move fast!

RELOADERS CORNER: Barrel Twist Rate

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Understanding the relationship between bullets and barrel twist helps prevent mistakes. Here’s what you need to know…

Glen Zediker

Sierra 90gr MatchKing

Why am I devoting this space this time to such a topic? Well, because it’s commonly asked about, and, no doubt, because it influences some of the decisions and options faced in choosing the best-performing load for our needs. Making a mistake in choosing twist can limit both the selection and performance in the range of usable bullet weights and styles.

First, barrel twist rate is a component in the architecture of the barrel lands and grooves. The lands and grooves form a spiral, a twist, that imparts spin to a bullet, and the rate of twist is expressed in terms of how far in inches a bullet travels to make one full rotation. “1-10” (one-in-ten) for example means “one full rotation for each ten inches of travel.”

Bullet length, not weight, determines how much rotation is necessary for stability. Twist rate suggestions, though, are most usually given with respect to bullet weight, but that’s more of a generality for convenience’s sake, I think. The reason is that with the introduction of higher-ballistic-coefficient bullet designs, which are longer than conventional forms, it is easily possible to have two same-weight bullets that won’t both stabilize from the same twist rate.

70gr VLD
Good example: 70-grain VLD (left) needs an 8; the Sierra 69-grain MatchKing next to it does fine with a 9. It’s bullet length that determines the needed twist, not just weight.

The M-16/AR15 barrel changes give a good example. Short history of mil-spec twist rates: Originally it was a 1-12, which was pretty standard for .224-caliber varminting-type rounds, like .222 Remington, which were near-universally running bullet weights either 52- or 55-grain. That worked with the 55-grain FMJ ammo issued then. Later came the SS109 63-grain round, with a bullet that was a bit much for a 1-12. The military solution was total overkill: 1-7. That’s a very fast twist.

Commercially, the 1-9 twist became the standard for .223 Remington for years. It’s still popular, but is being replaced, as far as I can tell, by the 1-8. An increasingly wider selection of barrels are done up in this twist rate. I approve.

1-8 twist.
Generally, well, always actually, I recommend erring toward the faster side of a barrel twist decision. 8 is becoming a “new standard” for .224 caliber, replacing 9 in the process. Reason is that new bullets tend to be bigger rather than smaller. Don’t let a too-slow twist limit your capacity to exploit the promise of better long-range performance.

I’d always rather have a twist too fast than not fast enough. For a .223 Rem. 1-9 is not fast enough for anything longer than a routine 68-70-grain “magazine bullet,” like a Sierra 69gr MatchKing. 1-8 will stabilize any of the newer heavier bullets intended for magazine-box cartridge overall lengths, like a Sierra 77gr MatchKing. An 8 twist will also shoot most of the longer, higher-BC profiles, like the Sierra 80gr MatchKing (which is not intended to be assembled into a round that’s loaded down into a magazine).

Other popular calibers have likewise edged toward faster and faster “standard” twist rates, and that includes 6mm and .308. Once those were commonly found as 1-10 and 1-12, respectively, but now there’s more 1-7s and 1-9s offered. Reason is predictable: longer and heavier bullets, and mostly longer, have likewise become more commonly used in chamberings like .308 Winchester and 6XC.

The tell-tale for an unstable (wobbling or tumbling) bullet is an oblong hole in the target paper, a “keyhole,” and that means the bullet contacted the target at some attitude other than nose-first.

Base your next barrel twist rate decision on the longest, heaviest bullets you choose to use, and at the same time realize that the rate chosen has limited those choices. If the longest, heaviest bullet you’ll shoot (ever) is a 55-grain .224, then there’s honestly no reason not to use a 1-12. Likewise true for .308-caliber: unless you’re going over 200-grain bullet weight, a 1-10 will perform perfectly well. A rate that is a good deal too fast to suit a particular bullet may cause damage to that bullet (core/jacket integrity issues), and I have seen that happen with very light .224 bullets, like 45-grain, fired through, say, a 1-7 twist. At the least, with that great a mismatch you might not get the velocity up where it could be.

.224 bullet extremes
Clearly, these don’t need the same barrel twist to attain stability: the bigger bullet needs double the twist rate that will fully stabilize the smaller one. There’s quite an extreme range of .224-caliber bullets, like this 35-grain varmint bullet and 90-grain match bullet. Now. Do not fire the little bullet in the big bullet’s barrel! It probably would not make it to the target… Swap barrels and bullets and the big one will likely hit sideways.

Bullet speed and barrel length have an influence on bullet stability, and a higher muzzle velocity through a longer tube will bring on more effect from the twist, but it’s a little too edgy if a particular bullet stabilizes only when running maximum velocity. My failed 90-grain .224 experiment is a good example of that: I could get them asleep in a 1-7 twist 25-inch barrel, which was chambered in .22 PPC, but could not get them stablized in a 20-inch 1-7 .223 Rem. The answer always is to get a twist that’s correct.

Effects on the load itself? Yes, a little at least. There is a tad amount more pressure from a faster-twist barrel using the same load, and the reason is initial bullet acceleration is slower.

The preceding was adapted from Glen’s newest book, Top-Grade Ammo, available here at Midsouth. For more information on this book, and others, plus articles and information for download, visit ZedikerPublishing.com

4 Things You Need to Know When Picking a Kid’s First Rifle

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It’s true: there’s one chance to make a good first impression. Choosing your child’s first rifle wisely goes a long way toward ensuring their lifelong interest.

by Drema Mann, NRA Family

Frist rifle

Have your kids ever asked to hunt or shoot with you? If so, you’re like a lot of other folks, and might be wondering where to start. To really feel involved, kids need their own gear — everything from hearing and eye protection to their own rifle. Choosing safety gear is straightforward enough, but when it comes to the rifle, you’ll want to make the best choice to ensure their success and enjoyment.

One: Size it Correctly
The rifle should not be too big or heavy, and the key to that is to make sure to involve your child in the selection process. Many parents purchase a rifle as a birthday present, and that is a wonderful idea. Years down the road it will be a special heirloom. But remember that predicting the arm length of a seven or eight year old is pretty difficult to do, and when the time comes, that rifle might not fit.

When my daughter, Montana, was about seven, she decided she would like to try her hand at shooting. We quickly found most youth guns were too long, and too heavy for her. Her first shots had to be taken from the bench, which was fine, but soon she wanted to shoot standing up like an adult. It took some searching before we found the right rifle. I suggest you visit a well-stocked gun store with your child to try rifles on for size. Much like their jeans, the gun must fit the child, or you could have a problem on your hands.

Two: Get a Good Trigger
Trigger pull weight is crucial too. A good starting point is to try a trigger with about half the pull weight of the gun. Take into consideration the size of the child, and remember, what works for one 10-year-old might not work for another. Some youth rifles have heavy, gritty triggers, and will only lead to frustration for you and your child. Avoid them. A crisp trigger with a light-to-moderate pull weight simplifies the complexities of learning to shoot.

Three: Match Their Personality
Probably the most important part to Montana was that the gun fit her personality. It was by no means one of the most important things to her daddy or me. No flat black or green camo for this girly-girl. She chose, you guessed it, a pink rifle. Maybe she gets that spark of personality from me but, for whatever reason, pink fits her perfectly.

Four: Invest Some Money
And finally, don’t be afraid to invest some money into this new-found interest. The Xbox you bought your child for their birthday cost just as much as a good rifle. The rifle will probably last longer and mean more in the end than any electronic gadget that could be obsolete in a month or two. If the gun doesn’t fit and they don’t like it, they won’t stay interested for long. Involve your child in choosing their rifle. Use it as an excuse to spend some quality time together, and you just might have a hunting and shooting buddy for a long time to come.

For Montana’s first rifle we settled on a Pink Platinum Smith & Wesson M&P 15-22. It weighs only 5.5 pounds and the stock has 1.25 inches of adjustability. She’s proud of her pink first rifle and proud to hunt and shoot. She’s since graduated to bigger guns, but still treasures her first rifle. On crisp fall mornings, you can now find her in the woods with her daddy or me. I can only hope I’m the one lucky enough to be in the stand with her when she takes her first West Virginia whitetail!

Step-By-Step Del-Ton AR-15 Kit Build Video

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By Ultimate Reloader:

Gavin at Ultimate Reloader shows you how easy it is to build an AR-15

Are you like me? Do you have a few spare AR-15 stripped lower receivers laying around that need rifles built from them? Now is a *great* time to build an AR-15 because component prices are low, and kits/parts are in stock! For years I’ve been wondering about Del-Ton kits, and I’d like to share with you my experiences building out an AR-15 rifle from one of Del-Ton’s kits!

Here’s a complete walk-through of my rifle build, complete with a quick range trip: (condensed build steps are just 7 minutes long!)

For a more in-depth look at the article, plus more of Gavin’s review, Click Here, and visit the Ultimate Reloader site!

Here are the complete specifications for this rifle: Del-Ton RKT100 from Midsouth Shooters Supply

For a look at the complete AR Build page at Midsouth Shooters Supply, Click Here!

I’m really liking this rifle, but I do have some upgrades planned, so stay tuned! Have you built a Del-Ton AR-15 rifle kit? I’d love to hear your experiences!

Thanks,
Gavin

 

Federal Lawsuit Filed Against Magazine Ban

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The Second Amendment Foundation, joined by several other groups and individuals, has filed a lawsuit in federal district court in California, challenging that state’s law prohibiting the possession, use, or acquisition of so-called “large-capacity magazines,” calling the ban “hopelessly vague and ambiguous.” This case could have repercussions on a similar magazine ban in Colorado.

the second amendment foundation

Joining SAF are the Calguns Foundation, Firearms Policy Coalition, Firearms Policy Foundation and six individuals, including one retired California peace officer. The lawsuit was filed in U.S. District Court for the Eastern District of California.

The complaint is a constitutional challenge to California Penal Code § 32310, as recently amended by Senate Bill 1446 and Proposition 63, and Penal Code § 32390 (the “Large-Capacity Magazine Ban”). The lawsuit alleges that if these measures are enforced as applied, they would “individually and collectively prohibit law-abiding citizens from continuing to possess, use, or acquire lawfully-owned firearms, in common use for lawful purposes such as self-defense (inside and outside the home), competition, sport, and hunting.”

“What we see in the enactment of such laws,” said SAF founder and Executive Vice President Alan M. Gottlieb, “is continued erosion by the state of its citizens’ constitutional rights guaranteed under the Second Amendment. When the U.S. Supreme Court incorporated the Second Amendment to the states via the 4th Amendment under the 2010 McDonald ruling, it automatically should have stopped this kind of prohibition.

magpul pmag ar magazine“As we state in our lawsuit,” he continued, “this magazine ban fails to provide fair or even adequate notice to law-abiding gun owners of what they may do with their personal property without being subject to criminal sanctions. In effect, this ban amounts to a backdoor form of confiscation, in part, of bearable arms that are protected by the Constitution.

“Enforcement of this ban,” Gottlieb concluded, “would immediately place thousands of law-abiding California gun owners in jeopardy of criminal liability and subjects their personal property to forfeiture, seizure and permanent confiscation, which is government taking, without due process or compensation. We cannot allow that to go unchallenged.”

The Second Amendment Foundation is the nation’s oldest and largest tax-exempt education, research, publishing and legal action group focusing on the Constitutional right and heritage to privately own and possess firearms. Founded in 1974, The Foundation has grown to more than 650,000 members and supporters and conducts many programs designed to better inform the public about the consequences of gun control.

 

Check out these other great articles from U.S. Law Shield and click here to become a member:

The just-released video above is from the Florida State Attorney’s Office, supporting a judge’s ruling that a citizen who opened fire on a man attacking a Lee County deputy last year was justified in using deadly force.
Taking the family to a state or national park this summer? Then you need to know the rules about firearms carry at your destinations,

M16 being replaced?

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After some 53 years in service, could the M16-series be on its way out? Keep reading…

Source: FOX News

Army researchers are testing half a dozen ammunition variants for a new prototype assault rifle that fires a larger round in order to introduce a possible M16/M4 replacement by 2020, according to Army Times.

The goal is to create a new light machine gun and inform the next-generation individual assault rifle/round combo, the report says. The weapon designs that are being tested will be “unconventional,” officials said.

Intermediate calibers being tested include the .260 Remington, 6.5 Creedmoor, .264 USA as well as other noncommercial intermediate calibers, including cased telescoped ammo, Army officials said.

6.5 Creedmoor
6.5 Creedmoor

Stay tuned…

Judicial Watch Sues ATF for Records of Attempted Reclassification of AR-15 Ammuniton

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Judicial Watch has announced that it filed a Freedom of Information Act (FOIA) lawsuit against the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF), a component of the Department of Justice, seeking records of communications related to a proposed reclassification that would effectively ban certain types of AR-15 ammunition as armor-piercing.

ball ammo

Source: Judicial Watch

The suit was filed in the U.S. District Court for the District of Columbia (Judicial Watch v. U.S. Department of Justice (No. 1:17-cv-00600)).

The ATF is reportedly reconsidering its February 2015 proposal to revise the 2014 Regulation Guide regarding the reclassification of certain ammunition.

In March 2015, more than 200 members of Congress wrote to former ATF director Todd Jones expressing their “serious concern” that the proposal might violate the Second Amendment by restricting ammunition that had been primarily used for “sporting purposes.” The letter asserts the ATF’s move “does not comport with the letter or spirit of the law and will interfere with Second Amendment rights by disrupting the market for ammunition that law abiding Americans use for sporting and other legitimate purposes.”

Judicial Watch filed the lawsuit after the agency failed to respond to a March 9, 2015, FOIA request seeking information on the ammo ban effort:

All records of communications, including emails, to or from employees or officials of the ATF related to the decision to revise the ATF 2014 Regulation Guide to no longer exempt 5.56 mm. SS109 and M855 (i.e., “green tip” AR-15) ammunition from the definition of “armor-piercing” ammunition.

The precise statutory definition of “armor-piercing ammunition” can be found in 18 U.S.C §921(a)(17).

“This is yet another example of how Obama’s wanton use of the ‘pen and the phone’ attempted to undermine the constitutional rights of all Americans, as opposed to upholding the rule of law,” said Judicial Watch President Tom Fitton. “The Obama ATF simply ignored our request on their ammo ban. Let’s hope the Trump administration finally brings transparency to this out-of-control agency.”

About Judicial Watch
Judicial Watch, Inc., a conservative, non-partisan educational foundation, promotes transparency, accountability and integrity in government, politics and the law. Through its educational endeavors, Judicial Watch advocates high standards of ethics and morality in our nation’s public life and seeks to ensure that political and judicial officials do not abuse the powers entrusted to them by the American people. Judicial Watch fulfills its educational mission through litigation, investigations, and public outreach.

For more information, visit Judicial Watch

ATF letter

Read the entire letter (PDF): Click HERE

REVIEW: Burris AR-332 AR15 Optic

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Looking for a durable, practical, effective AR15 optic useable over any realistic range? And one that’s not going to break the bank? Read about this Burris…

Burris AR-332

by Major Pandemic

According to the US Army Laboratory Command (Small Arms Technology Assessment: Individual Infantryman’s Weapon, Volume I, March 1990, to be specific), 98% of all targets across all terrain are engaged at less than 600 meters, 90% at less than 400 meters, and in urban terrain 90% at less than 50 meters. With this in mind we need the ability to be able to reach out to targets beyond the 15-25 yard lines but it is unlikely we will ever shoot out beyond 600 meters in a defensive or even hunting situation.

Adding even a marginally magnified optic enables more precision, faster target acquisition, and will deliver all you need to place hits quickly even way out there when yards adds up. More than a few serviceman and Designated Marksman know that the 4X Trijicon ACOG very positively transformed hit ratios within all ranges of combat engagement out to the 600 yard line; however, it also comes with a steep $1400 price tag. Burris to the rescue with a great $350 option.

BURRIS AR-332 3X PRISMATIC OPTIC
Burris is well known for building rugged, bulletproof optics. The AR-332 is a mil-spec brute of an optic which has stayed compact with a prismatic design. The design is a really nice crossover optic for CQB and scout rifle distances in a durable fixed power optic. Essentially the AR-332 is an ACOG but for 60% less money plus it includes a dual red/green illuminated BDC reticle. According to Burris, with the explosion of AR15 sales, they have been selling truckloads of these along with their 5X model.

FIT, FEEL, FINISH & FEATURES
Like all Burris optics, the AR-332 is excellent quality from the fog- and weather-proof construction through the very clear optics. At first I was wondering what I had committed to with the AR-332, however after a couple range visits I am sold on the design. The “donut” reticle definitely grows on you and in my experience is way faster up close and allows more precision than a more conventional duplex reticle at varied distances.

Burris AR-332
Picatinny rails allow piggybacking additional sights, lasers or lights. The AR-332 is backed by the Burris Forever Warranty.

There are a significant amount of refinements and extras on this scope. The Burris AR-332 comes ready to mount right out of the box with a picatinny base included ($50-$100 extra on other scopes here), scope caps that flip open all the way out of field of view, and wire retained windage/elevation caps. If you have an A2 AR15 with a carry handle, the AR-332 will work right out of the box after your unscrew the included picatinny base. On top of those features, the AR-332 is a very clear optic with an etched reticle visible as a black reticle after the illumination is turned off. The runtime is expected into the months range, but even when the standard CR2032 battery is dead you still have 100% of the reticle to work with.

Burris AR-332
The rotary, 10-position power selector allows quick changes from red to green powered reticle, or a black reticle when power is off. 5 red and 5 green power levels suit differing lighting conditions. A CR2032 battery powers the reticle.

FUNCTIONS
The illuminated reticle works and is brilliantly bright that can be seen in direct sunlight. The donut reticle is very fast on target even at distances under 25 yards or even at 2 yards. Dedicated points from 100-500 yards can make this a bit more precise than optics with just a single duplex style reticle or wider dispersed hash marks when the yards add up. Burris also includes picatinny accessory rails around the optic to bolt on things like lights or lasers. The circle hold marks for 200+ yards work great and allows small distant targets to be centered quickly.

AR-332 reticle
The reticle design provides a great combination of shorter-range speed and longer-range precision.

The eye relief needs to be more forgiving as it does not have a wide workable range compared to others. Plan on mounting the AR-332 at or very near the rearmost position. My stock position is always one detent in; however, longer-armed shooters may have to dispense with a rear back-up iron sight to mount the AR-332 in a proper position.

Burris needs to add a super-low illumination setting as even at the lowest option is still just a bit too glary when the lights go out. The reticle is still perfect for CQB ranges at night using the CQB Optic but a little annoying for shooting night dwelling critters in the pitch black.

With a variety of Hornady and Winchester 5.56 NATO and .223 Remington rounds, the Burris delivered all shots on 12-inch steel plates all the way out to 500 yards;, however point of impact did vary with each round. As with all BDC reticles, the aiming points will get you within a few inches; however, each round’s ballistics is different.

Burris AR-332
The author found the Burris AR-332 to be an outstanding performer, and at more than $1000 lower cost than the similarly-designed AGOG Trijicon, the AR-332 represents a tremendous value. The Burris is capable, durable, and rugged.

FINAL THOUGHTS
Designed for a 100-yard zero with BDC index points for 100-500 yards. This is a fixed power optic that is actually exceptionally good at CQB work thanks to that glowing donut. The Burris AR-332 is a great all-purpose optic for an AR15 owner to extend the range to allow confident placement out to 500 yards. That big glowing dot provides a great aiming point even at room-clearing distances. The more I use this optic the more I like it as a combat defensive scout optic covering the US Small Arms study ranges.

AN OBSERVATION: We all get older and usually with that comes deteriorating eyesight. I have been incredibly lucky that I still have fairly clear 20/20 vision, however I am starting to do that trombone move to focus in on the small print up close. The point is that magnification and sighting aids help aging eyes. A few of my buddies clearly need magnification and this is where even just a little 3X magnification can make all the difference between making a shot and being frustrated. If you are older, I recommend taking a serious look at what these low-power optics can provide you on your AR platform.

CQB OPTIC TIP: For optics with illuminated reticles, a tip to use them in a CQB environment is to close the front scope cover and shoot with both eyes open like you would with a red dot. With the scope objective cover in place, the eyes and brain will conspire to make the illuminated reticle appear as an 1X lit reticle regardless of the magnification, even if it is a 32X scope.

Burris AR-332

Check it out at Midsouth HERE

Factory Link: HERE

Major Pandemic is an editor-at-large who loves everything about shooting, hunting, the outdoors, and all those lifesaving little survival-related products. His goal is simple, tell a good story in the form of a truthful review all while having fun. He contributes content to a wide variety of print and digital magazines and newsletters for companies and manufacturers throughout the industry with content exposure to over 2M readers monthly.  www.MajorPandemic.comMajor Pandemic

 

AR15 Gas System Enhancements, Part 2

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Reducing the influence of excessive AR15 gas system pressure is most directly done reducing the pressure itself. Here’s how!

Glen Zediker

This is the second of two articles on ways to tame down an “over-functioning” AR15 gas system. Aside from running more reliably, reducing the evil influence of an overly-rapidly unlocking system improves cartridge case condition, which means longer case life. The first article talked about ways to increase the time the bolt stays locked, or delay its unlocking, however you want to see it.

Going more directly to the “source,” there are also ways to reduce the actual amount of gas that gets to the bolt carrier key and that’s up now for this one.

Adjustable gas block
Here’s an adjustable gas manifold. It’s a way to restrict the flow of gases through the system. Don’t get too greedy! Make sure to err on the side of function. These are probably the single most effective means to tame over-function. Check this one out HERE.

An adjustable gas manifold or “gas block” is an effective means to restrict the amount of gas that gets into the system. This device attaches at the port location, replacing the existing manifold (or front sight base if it’s a standard-configuration build) and will have some manner of valving function whereby propellant gases allowed to pass through the gas port in the barrel, through the manifold, and into and through the gas tube are restricted. Some incorporate a valve that regulates the passage dimension. Others provide a vent, more or less, to expel excess gas. I prefer the “valve-type” over the “bleed-off-style” devices.

Installation is straightforward, and these are available from a wide array of sources, so it shouldn’t be hard to find one that will fit even a custom-profile barrel. Standard for this area is 0.750-inches diameter. What matters is that the inside diameter of the manifold matches the outside diameter of the barrel at the connecting position.

There are different approaches to using this device but it’s really pretty simple. Figure out the minimum gas flow necessary to function the action and then open the flow-control screw adjustment a half turn more to give a little safety margin. Don’t get greedy. I shut one down all the way (minimum flow) and then open it up until the rifle functions.

The only foible on an adjustable manifold is that it has to fit in with the architecture of the setup you have. A retro-fit requires removing any muzzle device that might be installed and, of course, removing and later reinstalling the gas tube (make sure you check that it isn’t binding).

I have used other products that provide alternate means to do the same thing, like a gas tube with a valved adjustment mechanism. Sometimes something like that is best for anyone wanting to run a more standard gas manifold system. They work just fine, and dandy.

adjustable gas tube
There are other means for softening the system, and this adjustable gas tube is an example. Others include the “pig-tail” gas tubes that spiral around the barrel to increase tube length/volume. They all work…

Other gas tube modifications that work have been those formed in a spiral that wraps around the barrel, and I’ve seen tubes with expansion chambers (area of larger volume) along the span of the tube. What’s happening with these isn’t reducing the amount of gas, it’s just giving it more distance or room to weaken its presence.

The best solution I’ve yet encountered is fairly new and is an adjustable bolt carrier key. This requires no modification or labor about the barrel, and also works with virtually any AR15. Remove the old carrier key and replace it with the adjustable key.

adjustable carrier key
Here’s fairly new: an adjustable bolt carrier key from Sun Devil. David Beatty hit a long ball with this device, the ADIGS. I like it because it can be added to virtually any AR15 out there, even one that needs to maintain outwardly stock appearance. Works great. See more HERE.

A good while back I talked about gas port pressure and propellant burning rates and cautioned against using a propellant on the slower-burning side of “suitable propellant chart” center. To reiterate, I don’t think any propellant slower than Hodgdon 4895 should be used, but I know full well I can safely extend that range one more step to say something like Varget or RE15 is the limit. Slower propellants create more gas port pressure because they peak farther down the barrel, nearer the gas port location. Related: I recommend to anyone who’s going to do a longer custom barrel to request that the builder relocate the gas port another inch forward. There’s more gas contained in a longer barrel for a longer time: more pressure hits the carrier key as a result.

long gas tube
It’s common for an NRA High Power Rifle to get its gas port relocated forward another inch, or even two. The reason is because the 24-inch+ barrels we run “trap” more gas inside, which increases the pressure available at the gas port. The port farther forward gives more time and room (all the gas goes out when the bullet exits the muzzle).

No doubt, if you load up an AR15 with a heavy carrier and related parts then combine that with a gas restriction device, the range of propellants can move one or more steps slower-burning. In any of my full-blown across-the-course race guns, I can construct and successfully deploy loads that would wreck a rack-grade AR15. Don’t mess with that. Enjoy smoother and “softer” function and the assurance that you can run closer to a maximum load without fear of the odd and inevitable “pressure spike” causing problems. That’s why to do it.

The preceding was adapted from Glen’s newest book, Top-Grade Ammo, available here at Midsouth, click HERE to order. For more information on this book, and others, plus articles and information for download, visit ZedikerPublishing.com

Reloaders Corner: AR15 Gas System Enhancements, Part 1

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AR15s can have problems “over-functioning.” There are two essential ways to make your AR15 behave better! Here’s the first…

Glen Zediker

Right. I know this column is about handloading and reloading, so why am I spending space talking about gas system function? Well, it’s ammunition-related, or, at the least it is influenced by ammunition, and therefore also influences ammunition choices.

First, an AR15 gas system “over-functions” when it fills up too quickly and with too much burned propellant gas. The AR15 uses a “direct impingement” gas system, sometimes called an impulse system, and that means there’s a port hole in the barrel that lets gas out and through a gas tube, and this gas goes directly into the bolt carrier key and sends the whole works backwards. There’s no piston (although piston systems exist that can be fitted to these firearms) or other regulating device beyond gas port hole location and size.

AR15 bolt carriers
An M-16-profile carrier (back photo) weighs about 1 ounce more. Big big difference in slowing down initial movement. Get the right firing pin! If it’s a full-diameter carrier it will have a shrouded firing pin recess and takes a “large-collar” pin for correct operation.

The effect or upshot of over-function is overly quick bolt unlocking. The symptoms include extraction problems, damaged case rims (related), overly-blown cartridge case shoulders, excessive case head expansion, and, generally, accelerated wear on the action hisseff. As with many things, the severity of the excess function likewise increases excess in its manifestations.

What happens is that the case is swelled up under pressure inside the chamber, as it should be, but then it’s still swelled up when the bolt opens and the extractor takes a yank on the case rim to get it out of the chamber.

With respect to handloading ammunition, keeping the bolt in battery a tick longer makes a world of difference in spent case condition. The case has a tick more time to return to closer to normal dimensions and shrink away from the chamber walls. And time is, again, what this is really about. The case will be less stressed and dimensionally nearer original specs, and that means there’s “less” sizing done for next use, in effect. Case life improves and also does longer-term quality for reuse.

So. If we can delay bolt unlocking we’re seriously on to something. The simplest way to slow something down is make it heavier. Heavier things don’t accelerate as fast, they have a greater “moment of inertia,” less resistant to initial movement. Increasing bolt carrier mass is very effective. Keep in mind that what unlocks the bolt isn’t bolt movement, it’s bolt carrier movement. The bolt movement is a natural oucome to rearward travel of the carrier. Minor point but, well, there it is. I run “M-16 style” bolt carriers in all my AR15s. That’s a carrier with a full round section at the end rather than the notched out profile of the standard semi-auto carrier. And, no, an M-16 carrier won’t make a gun full-auto, and, as a matter of fact, carriers with the full-round profile are routinely encountered as “match” bolt carriers. Heavier is better!

Anything contacting the bolt carrier can increase in weight also and be effective. That effectively increases the load against the bolt carrier, and that requires more time to overcome and create movement. The buffer, for instance. I always run heavy buffers in my short guns, and also my hot-rod rifles for Across The Course use. The carbine-length stocks use a shorter spring and also a shorter buffer, and that means a lighter buffer.

AR15 buffers
Here’s an array of buffer components designed to slow the initial back-travel in the carrier. Anything helps, and more than one add-in makes an amazing difference in AR15 manners.

More about the spring’s role in all this next time, along with other more major modifications that will downright tame an AR15. And I’ll also run down a step-by-step on ensuring reliable function in a slowed-down AR15.

The preceding was adapted from Glen’s newest book, Top-Grade Ammo, available here at Midsouth. For more information on this book, and others, plus articles and information for download, visit ZedikerPublishing.com