9mm ARs also (generally) have less felt recoil making them easier and more comfortable to shoot. The Stern Defense, LLC. Add to Cart. His other areas of expertise include survival, prepping and firearms/ammo storage. AR Bolt Carrier Group Basics with Mike Mihalski of SOLGW With so many buying ARs of varying levels of quality, . Designed for lock back operating systems this 9mm bolt is heavy duty and will ensure reliable cycling your AR9 build. . Available in 9mm, .223/5.56, and .308/7.62 variations. The magic fairy dust is namely polytetrafluoroethylene you might know it by the brand name Teflon. Roughly 75% of the yearly estimate of stolen firearms occur during burglaries. RedMohawk 3.0 BlackDiamond 9mm/PCC BCG $ 279.99. The best 9mm BCG is out there, and one of the five listed above might fit your AR-15 9mm pistol the best. You shouldnt need to pay anymore beyond this general price range. Foxtrot Mike FM9 9mm AR Universal Bolt Carrier Group (0) $129.95 On sale: $115.99 Sale. December 3, 2020 December 3, 2020 by James Burton. But simply picking any random BCG doesnt create a flawless AR. But folding Americas favorite rifle the AR-15 can be a little tricky. Until you abide by a few considerations in your mind. 8. Beretta Cx4 Storm 92 9mm PCC Rifle, Blk - JX49221M . And it has a few extra touches that make it an excellent option for both competition and tactical shooting. Add to cart Quick View. 045-B2M630A000 | Anderson Mfg. Installation was easy and free of any frustrations. Because of that there isnt much to do to make them better than the others. The Bolt Carrier Groupaka BCG is often called the heart of the rifle, and the best Bolt Carrier Group for your AR-15 is the one that meets your needs perfectly. Blue chameleon PVD m16 Ar15 Bolt Carrier Group BCG $ 329.42 $ 149.12-48%. This is as close as youre going to get to a collective BCG. Score: 5.00 (votes: 1) However, not this one. Add to Wishlist + Faxon Firearms 5.56/300 BLK M16 Bolt Carrier Group - Nitride $ 145.00. Without a BCG, you cannot fire your 9mm. However, not this one. Hence, nitride coating allows the resistance against corrosion. When taking a look at coatings for anAR-15 Bolt Carrier Group, you are most likely to see examples of: Phosphate, Black Nitride,NickelBoron, Ion Bond DLC (Diamond-Like Coating), Titanium Nitride, among others. The Enhanced 9mm Bolt Carrier is still compatible with Colt and Glock lowers and magazines. Doesnt Add Any Additional Weight to the Rifle, Super Durable, Especially With the Addition of the Nitride Finish, Some Might Have a Challenge With the Installation, Easy to Install, Takes a Matter of Minutes, Super Durable and Resistant to Almost Any Kind of Damage, Lightweight and Doesnt Add On Any Additional Weight to the AR-15 9mm Itself, Little to no Failures Through 1000 Rounds, Might Be a Little Pricey For Most Budgets, Installation Might Be Challenging For Some Users, Some Modifications Might Be Required For Some Pistols, Easy to Install Without Any Modifications, Reliable to Operate Even After 200+ Rounds, May Not Be Compatible With Some Mag Blocks, Installation Might Be a Challenge For Some Users, May Slightly Interfere With Some Lower Receivers, Super Durable, Can Withstand All Kinds of Impact, Light in Weight, Doesnt Add Any Additional Weight to the Pistol, Compatible With Most Colt-Brand AR-15 Pistols and Magazines, Brownells - AR-15 Brownells 9mm Bolt Carrier Group, Faxon Firearms - AR-15 9mm Bolt Carrier Group, J P Enterprises - AR-15/M16 9mm Bolt Carrier Group, Best .458 SOCOM Barrels of 2022: Reviewed In-Depth, Best Double Barrel Shotguns of 2022 Ultimate Review. Once installed, they tested it at the range with their AR-15 pistols. All. Its my go-to pick for a simple plinker and mine has been working great for years. PVD and CVD are processes for applying an alloy on the BCG, there is a lot of technical details, but bottom line is that an alloy is turned into a vapor and applied to the BCG. Alternatively, it could be the pistol design itself. Think of it as an engine for your car. WMD Guns Nickel Boron X Bolt Carrier Group. White Label's house made M16 bolt carrier group is the perfect BCG for your next build and is compatible with any AR15 build. Thats a very attractive little package right there! Showing all 17 results . This gallery shows a sampling of their products. Compatible with most competition components, 1. Double-check the fine print. Ballistic Advantage 5.56 NATO Bolt Carrier Group - Black Nitride Made in USA by a quality manufacturer. Your email address will not be published. Michael Lutes is the managing editor and owner at Gun Mann. No failures or reliability issues were reported. All Rights Reserved. $179.95. No spam. There are nearly a dozen components that include a bolt carrier group. . If you already have one. Thats because its sturdy enough to handle the impact of multiple gunshots. It has a 16-inch barrel, a 15-inch handguard, and accepts common Glock 9mm magazines. HM Defense HMB Bolt Carrier Group 223 Rem,5.56 NATO Black Nitride 9310 Steel AR-15 Drop In $ 121.99. Out of Stock. Delta Deals BCG & Charging Handle Combos 9mm Nitride Bolt Carrier Group - Accepts Glock and Colt Mags (External Extractor) + AR-15 Ambi Charging Handle - Gold/Bronze. Honestly, the largest difference in 9mm BCGs are their coating. Out of stock. Share. View at Faxon. OverallOverall, if you want a 9mm bolt carrier group of the utmost durability and reliability and are willing to pay a premium price for it, then the JP Enterprises bolt carrier group deserves your close attention. Especially if you are looking for one to install in your AR-15 pistol. AR 15 Bolt Carrier Group Parts. This titanium BCG allows you to use multiple calibers, including 5.56, .300 Blackout, and .204 Ruger, without any issues. The carrier is constructed of US made 8620 steel, with a Nitride QPQ finish. Gun Details. . If youre looking for a BCG that is dependable, tough all over and is affordable for most budgets then this Foxtrot Mike may be exactly what youre looking for. That way, it wont cause any issues with any AR-15 pistol lower receivers. You dont have to choose between a Colt or Glock style 9mm AR15 because both Kaw valley and New Frontier make a modular 9mm bolt that accepts both style magazine. And there is no moving bolt since nothing locks into the barrel extension. Packaged 7.62x39 Bolt Carrier Group Assembly B2-K630-DA00-0P Bolt Carrier Group Assy., 5.56 NATO, M16 Profile, Nitride Bolt & Carrier, RF85 Treated The following is a list of some of the best 9mm bolt carrier group BCGs that are currently on the market as of this writing. This is as close as youre going to get to a universal BCG. Any one of the above bolt carrier groups brands for a 9mm AR that we have covered here today will be a solid option. Essentially, this is the upgraded version of Nickel Boron as it comes with polytetrafluoroethylene by the brand, Teflon. Remember that the bolt carrier group is the heart of your 9mm AR carbine. Whether youre building it from the ground up or simply upgrading it from something else, you want a BCG that is fully functional, smooth, and reliable each time you use your pistol. Nothing a little testing and alteration cant fix. The gas flows through the key and will fill up the chamber inside the BCG behind the bolt that has been created by the gas rings of the bolt, this forces the bolt to act like a piston and pushes the mass of the carrier backward. Granted, thats tens of thousands of rounds so rarely is it a problem for people but it will happen. A BCG is a must-have for your 9mm for whys and wherefores that are not completely optional. Glock Style Magazine. Quick View. How the bolt carrier group works In a normal AR-15 (note, not an AR-9) is when you fire a round, the gas will be redirected from the spent cartridge from the barrel and into a gas tube to travel back into the bolt carriers gas key. Trending: Best Ammo In Stock, Best AR-15, & Best 9mm Pistols. The Gas Key on a 9mm BCG is there to give the charging handle something to hold onto, it doesnt actually handle any gas. Now, lets kick off this list by unveiling our best overall choice: Recent buyers were able to install this BCG in a matter of minutes. Shop By Caliber.300 Blackout AR Parts 9mm AR Parts 6.5 Grendel AR Parts 7.62x39 AR Parts.308 AR Parts.350 . ), AR-9 9mm BCG + 1/2x36 Barrel - Choose Size, AR-9 9mm BCG + 1/2x28 Barrel - Choose Size, AR-9 9mm BCG + 1/2x36 Barrel + Magwell Adapter - Choose Size, AR-9 9mm BCG + 1/2x28 Barrel + Magwell Adapter - Choose Size, 9MM AR-15 Bolt Carrier Group BCG - Colt / Glock, Complete 9MM AR Bolt Carrier Group - Phosphate, CMMG MKGs GUARD Radial Delayed Blowback 9MM Complete BCG Repair Kit, Wilson Combat 9mm Stripped Bolt Carrier - Black Nitride (Carrier Only), Kaw Valley 9MM Blow Back AR-15 Bolt Carrier Group - Glock & Colt, FAXON 9mm PCC Blowback Full Mass Bolt Carrier Group - Gen 2 - 9mm, CMMG MKG GUARD Radial Delayed Blowback 9MM BCG and 16" Barrel Combo, CMMG MKG GUARD Radial Delayed Blowback 9MM BCG and 8" Barrel Combo, CMMG MKG GUARD Radial Delayed Blowback 9MM BCG and 5" Barrel Combo, CMMG MKGs GUARD Radial Delayed Blowback 9MM Bolt Maintenance Kit, CMMG Action Tuning Kit - MKG / MKGS Delayed Blowback GUARD. Recent buyers were able to call this a high quality and very affordable BCG. To make sure that you find the best one, weve put together a list of some of the best 9mm BCGs that are currently on the market (as of this writing). The BCG is placed into a magnetic field created by two electromagnets and submerged in a liquid solution of magnetic particles. But this is a BCG that is built to be beaten and run hard for things like competition. We carry all of the buffer parts that you need to help your 9mm blowback BCG run smoothly. (In Stock) $160.99 - $189.99. Toolcraft 9mm Bolt Carrier Group $ 149.99 $ 88.00 Add to cart. Mike has a passion for innovation and education across the industry to create great content, training, and insights from the best and brightest. What keeps the system safe and functioning is the weight of the BCG and the spring holding it closed. But its not as bad as you might think. The Colt brand has long been respected by many pistol enthusiasts. For 9mm bolt carriers, the bolt head is flat and is critical in creating a seal on the blow-back design of AR-15 9mm Pistol Caliber Carbines. So use (almost) any magazines you want. Robin Egg Blue (2) Pink Sherbert (1) Northern Lights (1) Battle Grey (1) Firehouse . Not rated yet. His passion towards enrolling in the Army drifted his interest towards light and heavy firearms. $ 149.95. Done wrong and it will flake off and cause a lot of problems. Rated 5.00 out of 5. He shares most of his passion with other gun enthusiasts here on Sniper Country. departer from what weve looked at before. From the box, it weighed 6 pounds, 10 ounces, with no magazine or optic. The options are limited and good options are even rarer. We will go a little deeper into what comprises a BCG in the next section. In some cases, you can even interchange the magazines. Bolt Carrier Groups; Charging Handles; Complete Kits; Gas Blocks; Gas Tubes; Iron Sights; KeyMod Accessories; . Many service pistols such as the Glock 19, Beretta 92FS, Smith & Wesson M&P, Walther PPQ, and so on are chambered for the 9mm Luger round, which is the most common pistol round in the entire world. If youre looking for something solid and may be a direct threat to the Brownells best overall spot, the bolt carrier group Faxon Firearms BCG may be your other choice if youre looking for something that is strong, reliable, and goes with almost any AR-15 9mm AR bolt carrier groups in existence. So we do our best to find some of the best BCGs that are easy to install and wont need the services of a gunsmith for a suitable install. The following is a list of the five best 9mm BCGs currently on the market. Some buyers were also building their pistols from the ground up and needed a functional BCG that was right out of the box. Saturday: 10am 5pm Lightweight and doesnt add on any additional weight to the AR-15 9mm itself 2. Preision 9mm Complete BCG 9mm bolt carrier groups is an outstanding bolt carrier group that you can use with just about any lower receivers out there. This bolt carrier group is also companionable with the Law Tactical folding stock adapter, which is suitable for storage and staging. You should have all the parts you need to ensure that the BCG 9mm bolt carrier group works properly and is ready to be installed. However, its got more of a matte look, and feels quite similar to a phosphate finish. This might be the biggest thing to look for first so pay attention! This is as close as youre going to get when it comes to the best in dependability for a Colt-style pistol. Last but not least, cost matters. On top of all that, this Stern Defence bolt carrier group is one of the most budget-friendly on the market, period. If you have a Glock 34, Glock 17, or a Glock 19 for your handgun, you can use the same magazines for both weapons. NP3: This is basically Nickel Boron with some magic fairy dust. Functions with all AR15 style PCC systems including: Colt Style Magazine. Faxon Firearms. $125.95; Out of stock. Custom Deal BCG & Charging Handle Combos 9mm Nitride Bolt Carrier Group - Accepts Glock and Colt Mags (External Extractor) + AR-15 Ambi Charging Handle - Gold/Bronze. As such, it lost a lot of popularity because there arent many companies that can do it right. Even if youll be spending an amount thats high on your firing pin budget range for the best 9mm bolt carrier group, its a lot better than buying an ineffective BCG just because of the cheap AR9 gas key price tag. J P ENTERPRISES. matte-black 9mm blowback bolt carrier group from 416 stainless steel. When hes not writing, hes either learning a new skill, trekking or enjoying a long drive. Whether youre building it from the ground up or simply progressing it from something else, you want a BCG that is fully practical, smooth, and dependable each time you use your pistol. Especially something that will last them for a long time. 919 NATO Chamber. 9310 bolt, MPI/HPT Tested, Shot Peened, Nitrided. 8620 Single Piece Bolt. So it sticks out for its potential to be a long-lasting BCG, especially for the avid target shooter. A lot of recent buyers were quite happy with the BCGs overall function and durability. FailZero EXO Nickel Boron 9mm AR9 AR-15 Bolt Carrier Group, FailZero 9mm AR9 AR-15 Bolt Carrier Group - Black Nitride, Angstadt Arms 9mm AR-15 Bolt Carrier Group, Spike's Tactical Complete 9mm AR-15 Bolt Carrier Group, Alpha Shooting Sports PCC 9mm Bolt Carrier Group - V2 - Nitride, Rubber City Armory 9mm AR-15 Bolt Carrier Group, Foxtrot Mike Products Premium 9mm AR-15 Bolt Carrier Group - GLOCK Style, Faxon Firearms 9mm AR-15 Bolt Carrier Group GLOCK/Colt Style - Nitride, Odin Works 9mm AR-15 Bolt Carrier Group - Nitride, YOU MAY ALSO BE INTERESTED IN THESE PRODUCTS. Save my name, email, and website in this browser for the next time I comment. The 9mm AR-15 bolt carrier is also machined from 8620 Alloy Steel and is completed with a Nitride finish. 65 Warning for CA Residents Trusted quality and reliability, the ODIN Works 9mm BCG is designed to work with both Colt and Glock style lowers and magazines. There are a lot of material variations out there. The results are pretty great, slick, smooth, very resistant to corrosion and can even be run with less lube. Tiger Rock Inc. .223/5.56 Polished Aluminum Lightweight Competition Bolt Carrier Group Features: 9310 Steel MPI Bolt .223/5.56 Caliber Mil-Spec Precision Machined 7075 Polished Aluminum Carrier Anodized Finish - Blue Lightweight 5.9oz Reduces recoil/increase cycle speed Competition Shooting Design NO FULL AUTO CAPABLE Fits: AR-15 / .300BLK 5.56 BCG Beretta 3032 Tomcat [Review]: A Worthy Self-Defense Pistol? So it can take multiple hammer hits on a great day. 45 ACP Parts; Barrels; Bolt Carrier Groups; Complete Kits; Conversion Kits; Lower Parts; Muzzle Devices; Pistol Stock Sets; . . FFL orders are delayed 7-8 business days from receipt of FFL license. Purpose-built for 9mm AR-15 pistol caliber carbines, our Generation 2 PCC blow-back carriers keep the features of our well-loved first BCG with modern improvements. Made out of 8620 Steel, and designed to work with Colt and Glock style magazines, this BCG is designed to make sure that you will not have any malfunctions when you are out in the field or on the range. Machined from 8620 steel and featuring a nitride finish, fracture resistant grade 23 titanium pin, and 4140 steel extractor, the EPC bolt assembly is precision machined from the ground up to meet the . For example, most AR-9 pistols will accept Glock 19 length or longer 9mm magazines. Salt Bath Nitride Finish inside and out.
On a side note, make sure the bolt works with ramped barrels. AR-15 9MM BOLT CARRIER GROUP FOR GLOCK AND COLT. MSRP: $149.99 |. AR-15/AR-10 Bolt Carrier Groups made from the best manufacturers like Lantac, 2A-Arms, Mil Spec, Enhanced, Tin, nickel boron & Nitride BCG's . After 100 rounds, it remained reliable for a lot of shooters. This will be used by most AR-15 pistols users that are casual or competitive target shooters. This BCG is something that might have been created for the competitive shooter in mind. As you look through each one, pay attention to the features and functions. Backed by over 50 years of combat-proven service in the military, it has become the most popular BCG coating and it gets the job done effectively. You can learn more about me here. Between the price and the magazine compatibility, you can easily create your 9mm pistol caliber carbine for the lowest possible price. Out of stock. If you're building a pistol-caliber AR-15 in 9mm, you'll need a 9mm bolt carrier group and Spike's Tactical delivers. Only 7 left in stock. Phosphate and Nitride are the most economical and common coatings youll find on BCGs. Quantity Purchased. Address: 40 S Main St, Tooele, UT 84074, United States, Monday Friday: 10am 7pm This includes all of the awesome properties of Nickel Boron but with the added dry lube of Teflon. Last but not least, this bolt carrier group is compatible with standard AR-15 upper receivers and ejection port covers. If you are currently looking for the best 9mm BCG for your AR-9 carbine, youve come to the right place. $ 149.95. All. Remember, this BCG is going to be with you for the long term. The Brownell's Titanium BCG pairs best with an adjustable gas block. Weight: 1.4lbs (5") and 1.7lbs (8") There are very few 9mm bolt carrier groups with that sort of magazine compatibility. There is no right or wrong answer here, just pick the system you like best and run with it. Some brands still run MPI and having a BCG that passed MPI is a lot better than one that didnt. Last but not least, its finished in black nitride finish and is heat treated too. Quick view. to reduce the chance of out of battery firing. This kit contains the two most crucial components that affect the performance of your AR-15. Most recent buyers are looking for a reliable BCG for their AR-15 pistols. The image below gives a nice breakdown of the parts in a typical BCG. There are a lot of options for an M4 scope, especially online, so weve sifted through the best of the best for you. Verified Member Gold Member. Did you find this article useful? m16 bolt carrier group 5.56 & 300 blackout bcg - radiant blue haze (blue gray) msrp: $240.00. To prevent this, many BCGs are tested via magnetic particle inspection. Speaking of shorter barrels, small weapons are always easier to maneuver in tight spaces. PSA Freedom AR-15 Nitride Bolt Carrier Group With Carpenter 158 Bolt - 516446915 . Youll often find TiN coated BCG in high-end AR rifles. At this point, its companionable with most of them but not all of them. Rating: 95% Regular Price $129.99 . sale price: $189.99 Nickel Boron Bolt Carrier Group - AR15 M16 .223 - 5.56 . Most of these are your pins and springs that will hold it all together. RTB is now offering our own line of .22LR parts and accessories. Shop . Blue AR Parts Silver/Chrome AR Parts . 1. Sale! Our . The AR-15 bolt carrier group, or BCG, is a critical and often misunderstood piece of the AR-15/M16 upper receiver. Description. Most of the users will be shooters who will look for something that will give them the same reliability after 100+ rounds fired. Whether it be low . 4.9 (6) 9MM CARBINE BOLT CARRIER GROUP SHORT STROKE COMPATIBLE. If you have any feedback or question about my articles, please submit it here, it's always appreciated! Drag and drop me to the cart. This is made for shooters who want their Colt AR-15 pistol to last them as long as possible (so long as they take great care of it). The 7.62 NATO AR-10 bolt carrier groups are compatible with DPMS-spec large frame receiver sets and associated . Unsubscribe at any time. Read more. BCG Shroud, AR15.com. 4140 Chrome Moly. After all, the vast majority of AR rifles and carbines are chambered for rifle rounds such as the 5.56x45mm NATO, which offer much greater range and superior ballistics than pistol rounds such as the 9mm. This is lightweight, easy to install and remove, and battle-tested to take on whatever application you put your AR-15 9mm pistol through. Either way you can't go wrong as Glocks 32 round magazine has proven to be just as reliable as Colt.

Select Brand. But as far as Ive seen, almost no one HPT their 9mm BCGs. Sale. Special Price $139.99. Citadel 1911 Review: Best Budget-Friendly Pistol? Save 13% MSRP: $ 149.95 $ 129.95. This is as close as youre going to get when it comes to the best in reliability for a Colt-style pistol. 1. Quick view. So it has the capability to work with a good amount of upper and lower receivers. Unit Price. Typically, coatings such as,Black Nitride and Titanium Nitride will help your BCG withstand corrosion and general heavy usage of the rifle. Aside from the easy installation process and quality construction, most users are able to fire off hundreds of rounds without a single reliability issue. Simple as that. Be sure to double check which one stands out as your perfect BCG so you can make a choice without thinking too much. 2A ARMAMENT; A.R.M.S. This can make for a neat and convenient setup for home defense, bugout bags, competition, and just plinking at the range. Watch on. High-Pressure Testing is basically what it sounds like. Parkerized: This is the mil-spec coating (for M4s at least). Features: 9310 Steel MPI Bolt .223/5.56 Caliber Mil-Spec Precision Machined 7075 Polished Aluminum Carrier Anodized Finish - Bright Blue Lightweight 5.9oz Reduces recoil / increase cycle speed . BONUS OFFER: Get your free shooting range targets to print at home! Folding rifles are all the rage right now and for good reason, theyre handy and easy to travel with! Nitride coating is the most popular choice of coating, a type of chemical treatment that hardens the surface. It fits most Colt AR-15 9mm pistols without any issues. This includes all of the awesome properties of Nickel Boron but with the added dry lube of Teflon. As a golden rule, bolt carrier groups typically cost anywhere from one hundred to three hundred dollars depending on the group. The slightly longer and heavier bolt carrier group has an additional lug at the rear of the bolt carrier group. 17-4 stainless steel firing pin with spring. Remember, this BCG is going to stick with you for the long term. $159.95; Out of stock. Done right, hard chrome is easy to clean, smooth, super corrosion-proof, and just wonderful to use. The Toolcraft 9mm Bolt Carrier Group is a full-mass BCG perfect for your Blowback Pistol Carbine Caliber AR15 build. Read more. Most of these are your pins and springs that will grip it all together. Its just a mil-spec finish. Lantac USA M-SPEC 5.56 Bolt Carrier Group Titanium Nitride A BCG is the most important component inside your AR rifle. M16 Bolt Carrier GroupBillet Extractor, 5.56, Blue PVD. New Releases. Sale! Includes Firing Pin. For something that wont jam even after 1000 shots, thats quite a bright sign. Top Sellers. If your AR-15 9mm rifle needs an upgrade or if youre building one from scratch, one of these five will end up being yours to own. Check out this detailed discussion to get better insights about this topic, and also take a look at the best 9mm BCGs that are prevalent today. $179.99. One of the things that may improve is making some alterations to the size. Aero Precision 5.56 Bolt Carrier Group, Complete - Black Nitride $ 149.99 $ 112.49 Select options. The Gunner BCG is made from 9310 steel and weighs 8.2 oz. However, this bolt carrier group is well-matched with Glock and Colt SMG magazines. 9MM Black Nitride Bolt Carrier Group : Price: $ 159.00. If youre looking for a BCG that will be the perfect match for your Colt AR-15 9mm pistol, look no further than the Colt brand BCG. Colt magazines are easier to load, look cooler, and are metal. The Rainier Arms 9mm Precision Match Grade Bolt Carrier Group is incredibly well built. Your Price: $127.49. $129.95. Furthermore, the installation was easy and needs no modification. RedMohawk 3.0 9mm/PCC BCG BlackNitride ELITE $ 199.99. Because youre certainly going to need one if you want your 9mm to fully function to the best of its capability. So it sticks out for its prospective to be a long-lasting BCG, especially for the keen target shooter. This BCG has the aptitude to work with all kinds of charging handles. If you want a fully functional 9mm bolt carrier group for the lowest price without any silly hiccups, then this is the bolt carrier group for you. Regular Price $999 . Rated 4.92 out of 5 based on 12 customer ratings. This drop-in 9mm Bolt Carrier Group features a corrosion resistant Nitride finish and is machined from 8620 steel. Aero Precision EPC 9mm Bolt Carrier Group, Direct Blowback - Nitride DESCRIPTION. This is lightweight, easy to install and eradicate, and battle-tested to take on whatever use you put your AR-15 9mm bolt carrier groups pistol through. Your email address will not be published. Additionally, components like magazines, magwell flare, and Colt or Glock compatible upper and BCG are also important considerations before creating the AR9 build. So it can take multiple hammer hits on a good day. OUR TOP PICK: Brownells - AR-15 Brownells 9mm Bolt Carrier Group. The ejector on this bolt carrier group doesnt seem like it has the appropriate angle to ensure reliable ejection through a standard AR-15 ejection port. In addition, the remaining 25% occur during other property crimes.