The Brownells M16 5.56 Complete Bolt Carrier Group is an affordable option that is built and tested to provide flawless operation in any AR-15 or M16. We take this Ruger Mark IV Tactical f Any suggestions? Faxon Chameleon AR-15 Complete Bolt Carrier Group If you want your AR-15 rifle to perform at the highest level then look no further than this Faxon Chameleon AR-15 5.56 NATO Complete Bolt Carrier Group. Hard Chrome has the edge in hardness but Nickel Boron wins on slickness. In fact, chrome BCGs are somewhat difficult to find today, but worth it if you can find one. You do not pay Chrome is a finish well suited to the harsh environment where the bolt carrier group operates. Do check them out. Mil-spec doesnt mean greatest ever, or worst, its just in spec to a military contract. A Mil-Spec BCG is about 11.6 ounces, but you can be much lighter nowespecially with cuts and exotic materials like titanium. APF Armory Bolt Carrier Group AR-15 223 Remington, 5.56x45mm Nickel Boron; APF Armory Bolt Carrier Group AR-15 223 Remington, 5.56x45mm Nickel Boron Shop All Featured Ammunition Featured Reloading Supplies Featured Gun Parts Featured . LANTAC 223/5.56 E-BCG Full Auto Style Bolt Carrier Group - Nickel Boron. So, if youre building a SHTF, zombie-apocalypse-proof, riflego with a regular BCG. I of course went with their Titanium Nitride (TiN). , What is the MAG Qual? If I want a black finish and I have the money, DLC all day long. We only sell the best bolt carrier group, because we understand the crucial role it plays in the function of your AR-15. Aero Precision Black Nitride BCG (SpiceTac). Change one and you have to adjust the rest. Bolt lugs are chamfered 45 degrees to ensure reliable action for even the highest pressure hand loads and fast lightweight actions. A few definitely deserve to he there, but not all. Shell be able to help you out. The title should read, These are the 10 best that I use since most of them are affordable. I use and have used a lot of the different BCGs out there, both cheap ones and high priced ones. We only email about once per week and we do our best to make sure they're worth your while. THE BATFE HAVE RAN THEIR LAST UNJUST ATTACK. Toolcraft is an OEM provider of BCGs to AR15 manufacturers. beta boy will always lick the biggest shaft long as they pay his fary white tennessee ass.. Old school vs new school. So if you don't mind cleaning your current and the recoil isn't a big deal, what other reason is there to change? AR15 Bolt Carrier Groups White Label's parent company, DRG Manufacturing produces our M16 BCG which is trusted by seasoned shooters and depended on by experienced builders. Our Price: $199.00. *Coloration can vary greatly from BCG to BCG due to the manufacturing process. Add to Wish List Add . But with one of Cryptic Coating BCGs you dont have to run them dripping wet which is a definite plus when running suppressed. BCG/CH: Tactical Solutions Group AR-15 5.56/.223/.300/.350 Side Charging Bolt Carrier Group + Knurled Threaded Side Charging Handle for Tactical Solutions Group Side Charging BCG x2 MSRP: $134.99 $109.99 Sale The primary advantage of this is to reduce recoil. Its great NiB will run fine with a small amount of lube I recommend using normal amount of lube. I kept scrolling, looking for the Lewis. Thanks for sharing. In fact so to cut corners in the learning curb for would be buyers? The pistol we The Faxon 5.56 M16 Bolt Carrier Group, Nitride is a high-performance and reliable upgrade for your AR-15 rifle. These two super hard finishes are both easy to clean workhorses that will take the punishment and come back for more. I was surprised they weren't included too. GUARANTEED. The gold color is unique and makes a very nice contrast against the matte black of the AR15. 5.56 Extractor Kit $ 4.95. Its pretty cool to see they are still around innovating products like their Xtreme Performance Bolt Carrier Group. Expensive especially since you will probably have to send yours in to be refinished. , The bolt carrier group is the heart of your AR15. The PVD coating by Ionbond provides a very low coefficient of friction while providing a unique look and increased reliability. You may want to look into Barnes Precision Machine next time. The PVD coating by Ionbond provides a very low coefficient of friction while providing a unique look and increased reliability. Both of these finishes are far ahead of phosphate as far as slickness and ease of clean up are concerned. If you ask most people online whats their go-to BCGthe vast majority is going to be BCMs M16 BCG. Colt needs no introduction. Enable Accessibility. Designed for use with all 5.56-NATO-based cartridge cases. Great combo with their builds if youre buying stuff from them anyways unless you want a different coating. It also has high corrosion resistance as well as a natural lubricity. Wilson Combat DPMS LR-308 Complete Bolt Carrier Gr. Create an Account; Login; Create an Account; Cart (0) View Cart; I own a few from cryptic Coatings, Radian, and toolcraft. It physically moves backward into the buffer tube as the gun is fired and does the work of chambering the next round when pushed back into battery by the buffer. It's a good option, for some people, but it's not a great option for a lot of people. AB Arms offers their Nickel Boron Bolt Carrier Group for the AR-15 user who demands excellence from every component of their rifle. Ionbond Diamond Like Carbon (DLC) Coating is a state-of-the-art metal finish applied through a Physical Vapor Deposition (PVD) process. There are so many BCGs out there so let us know what we missed. Phosphate +3. The link hereand below will auto-add it. Here are some of our favorites. We'll only use the information provided according to our privacy policy. BCM M16 BCG Nothing much to say except it's mil-spec everything and has a great reputation. 4 barrels in 15K rounds?? I do like them in terms of increased lubricity and ease of cleanup. If you're looking for the best bolt carrier group for sale, you need to shop with Surplus Ammo. An awesome AR-15 needs a great bolt carrier group (BCG). Ive run into more semi-experienced shooters than I can count who had no idea, or only a vague idea, what headspace is, and had never checked it on any of their bolts/barrels/rifles. And has worked out great in my Faxon builds (Faxon Barrel Review). NP3 is a proprietary finish offered by Robar Inc. Standardizing military equipment dates back centuries. Maybe you have a better cartridge but it its not 5.56 NATO specs they will not accept it. Properly built, no corners cut.DISCLAIMER: Due to the PVD process, each product may have a slight variation of color. I used Toolcraft nitride bcgs for my last 2 builds and have been more than happy with them. Man it sucks to see how much the prices have gone up since this article was posted just a few months ago. Aero Precision Nickel Boron BCG First Look Review Stabilizing a Muddy Road Russ Lanoie Sons of Liberty Gun Works East India Upper Receiver - Owner Induced Feeding Problem School of the American. It has the lubricity of the NiB, it is cheaper than NiB and it cleans up every bit as easy. And check out the rest of our Best AR-15 Upgrades. Plus the silver color pops out in your upper receiver. LMT says their MARS-H platform is SR-25 and the only BCG that will work in their own BCG. Properly manufactured BCGs with a phosphate finish will still have a chrome lining inside the gas key and inside the carrier where the gas rings ride. Their mil-spec phosphate BCGs are a little bumpy but they work. Yea, nitride is just fine! A sports car needs a great engine. I became my group's "gun guy" and everyone who had questions came to me. Posted: 8/8/2017 3:54:01 PM EDT. Celebrate Our New Site by Winning our $12,000 Gun Room Giveaway | Enter Here, Suggestion All Colt makes these days are the extractors, The pony is a mere shadow of once greatness.. Are the Phosphate bolts stronger than both NiB & TiN? Or you are doing a retro build, which I can appreciate! And you never know if a batch is 10 or 1000 BCGs. Give it a rating below. THE BATFE MUST DO, SAY PLEASE WITHOUT EYE CONTACT THEN MUST BE PLACED ONTO THY POLE THICC AND LONG WITH BARE UN LUBBED RECTUM UNTIL TEARING OR BURSTING SOUND IS AUDIBLE ETC AND THESE ARE SUBJECT TO OUR INTERPRETATION AS ALWAYS NO MATTER WHAT THEY SAY HERE IN BECAUSE WE SAY SO TOO BAD NOW BE GOOD GOV WORKING INDENTURED SERVANTS WHO CRAVE PENIS, SPERM AND ANY FORM OF VIOLENT HOMOSEXUAL INTERCOURSE BECAUSE ITS JUST HOW THEY DO SINCE INCEPTION SO YEAH. The bolt is the forward-most part of an AR BCG. An aluminum carrier rubbing an aluminum receiver led to the carriers being used up in a few thousand rounds. The bolt carrier group (also known as the "BCG") is the heartbeat of any rifle like an AR-15 or AR-10. purchase helps support my work in bringing you more awesome gun and gear articles. Ionbond Black DLC will not chip, crack or peel, providing you with years of reliable function and protection against wear. On a full-auto AR-15 or M16, this rear lug pushes the sear release downwards which allows full auto (or burst) fire. There were also carbon deposits on . Our Nickel Boron coating reduces friction, simplifies cleaning and maintenance, and extends the life of critical components. Nickel Boron M16 Bolt Carrier Group Shot Peened Bolt Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert 223/5.56/300 Blackout Now . Can you provide some input? Green +2. Heavier revolvers (e.g, stainless vs. titanium) have less felt recoil, heavier semi-auto pistols (stainless slide vs. aluminum etc.) Not sure how he failed to include Toolcraft. sorry I've owned a lot of BCG's and any discussion of the best BCG that doesn't include Cryptic Coatings at the very top is not worth reading. The Spikes Tactical M16 5.56 Nickel Boron Bolt Carrier Group puts the Spikes reliability and durability into your custom AR-15. There is no best bcg.Buy one with a great reputation,for me thats Colt.I have Lmt,Psa,Lwrc they all work but Colt is inspected,tested and in spec.THE MOST TESTED. From my perspective, however, 9310 is an excellent option and is objectively stronger than 8620 and Carpenter 158 steel. These are two of the least expensive finishes available. Young MFG BCGs if you want real precision and aerospace component process technology. The Brownells M16 5.56 Complete Bolt Carrier Group features a bolt fabricated from 9310 steel that includes a heat-treated and shot-peened finish. $199.00 $169.00. And I say this because it's alot stronger of a steel and lighter, so ad a DLC coating and I don't understand how it doesn't automatically win? 6 Reviews. So to say that its all mil spec is a kind of buzafication of information . Want something in the middlethats mil-spec AND Nitride coated? In Stock. 8620 Steel, 9310 Steel, Carpenter 158, Carpenter 158 Steel, Stainless Steel, Blue PVD, Chameleon PVD, Chrome, DLC, Ion Bond FDE, Lithium Isonite, Mag Phosphate, Nano Diamond Nickel, Nanoweapon, Nanoweapon Chrome Nitride, Nickel Boron, NP3, TiN, Salt Bath Nitride, Stainless Steel, HP Tested, Individually HP Tested, Untested, Blue PVD, Chameleon PVD, Chrome, DLC, Ion Bond FDE, Lithium Isonite, Mag Phosphate, Nano Diamond Nickel, Nanoweapon, Nanoweapon Chrome Nitride, Nickel Boron, NP3, Salt Bath Nitride, Stainless Steel, TiN. Blem PVD Rainbow m16 bcg Chameleon bolt carrier group $ 159.99 $ 119.99-24%. FailZero 7.62 x 39 EXO Nickel Boron Bolt Carrier Group $ 179.99 $ 171.99 More Info. Category suggestion. Free shipping on orders of $199+ |Use Code: SITESHIP | Restrictions apply, Offer ends 3/5/2023. Sharps Rifle Co. Xtreme Performance BCG (DLC). . The Sharps 308 Balanced Bolt Carrier Group Complete has the same innovative design as the Sharps 5.56 Balanced Bolt Carrier Group. Any issues and they are handled expediently!!! WMD Guns' proprietary NiB-X nickel boron coating for BCGs delivers a finish over 40% harder than chrome and with a 30% longer life span even in a rifle bore. WE HAVE ARBITRARILY DRAFTED DOCTRINE AS WELL WHICH STATES AS FOLLOWS TO STOP THEIR FUN: If it does what you want it to do, there isn't a need to change. It has a dull gray finish darker than chrome and nickel boron. I have yet to find a source except for some sketchy surplus sellers. Looks great under our PREMIUM Handguards now Buy 1, Get 1 FREE! Bolt Carrier Groups (BCGs) Fail Zero M16/Full Mass Nickel Boron EXO Bolt Carrier Group - BCG / Print: Fail Zero M16/Full Mass Nickel Boron EXO Bolt Carrier Group - BCG DEAL OF THE DAY Rating: Total Reviews: (104 reviews) Write a Review Product Code: FZ-01428 MSRP: $169.99 Sale Price: $114.95 Savings: $45.05 Add Charging Handle: None PSA made the list of best BCG but DD isn't on the list? Im still testing this one out but it might be a good substitute for the RCA one at some decent savings. For specific comparisons of black finishes (Phosphate vs Nitride vs DLC ) see here The Best Black BCG Finish - Phosphate vs Nitride vs DLC. Please review product photos. Ive actually had two BCGs gas keys come loose, one being an early Fail Zero NiB BCG. Type your new password and hit button below to confirm it. My current go-to for competition shooting is the RCA BCG but costs a pretty penny since the carrier is Titanium. Top 3 Reasons You Might Want a Nickel Boron BCG. Nickel Boron treated parts include: Bolt Carrier, Bolt, & Bolt Components. Which does its job but does require more cleaning than newer coatings. , AR-15 Pistol vs Rifle: Which Should You Choose? Buy PSA m16 full auto nickel boron bolt carrier group: GunBroker is the largest seller of AR15 Parts Gun Parts All: 973044689. So far I can definitely feel the recoil difference between the different settings. Above: Toolcraft DLC BCG installed with black anodized Aero Precision upper, lower and M-LOK handguards. Rated 5.00 out of 5 $ 125.00 $ 114.99 $ 125.00 $ 114.99 Add to cart Quick View. Custom Deal BCG & Charging Handle Combos Strike Industries Charging Handle with Extended Latch - FDE + Rise Armament Bolt Carrier Group, .223/5.56, Nickel Boron Finish. 8620 M16 Style Carrier PVD Coating by Ionbond Heat Treated Bolt Carrier Group- Nickel Boron $ 225.00. Hmmmseems you left out an industry leader who actually makes BCGs and not rebrand someone else's. I have an old Colt AR15 semi-auto BCG. I'm not affiliated with any of these brands, just things I've learned while building. Since LMT says the only BCG that works is theirs, I would go with what they say. Is any of this sounding like a worthwhile version of the truth? They take take and take but this arbitrary law states one penis per tounged mouth.. so one of the better thinkers decided to remove his tounge per the statue citing one cock per tounged mouth. then went out and stuffed a whole YMCA boys club in his mouth and see where he ended? NiB coatings do add thickness and most bolt makers pay attention to the bolt face but for get about the lugs, where a small buildup of carbon will lock your bolt up. Firearms instructor John Farnam has NP3 applied to not only the BCG but also the inside of the upper and lower receivers of his custom FSM4 AR15s. Spike's Tactical AR15 9MM Bolt Carrier Group Usually Ships in 24 Hours MSRP: $199.95 . Smooth cycling and is easy-to-clean by simply wiping it down. When that build is complete be sure to shop for ammo here:Buy Ammo Online. Quantity: We currently have 1 available. What brand is the full auto in the comparison that you did? It weighs in a little lighter than the Faxon at 8.2 ounces probably due to the one additional cut. 9MM BOLT CARRIER GROUP - NICKEL BORON. Thanks! Heres my opinion, That does it for BCGsthere are lots to choose from. Nickel Boron (NiB) coatings offer durable and reliable operation. Please view details for more information. Description The NBS M16 bolt carrier group is the perfect BCG for your next build and is compatible with any AR15 build. Either will get the job done. Full mil-spec everything. 13 Best AR-15 Bolt Carrier Groups (BCG) 1. My WMD NiB BCG has been chugging along in my AR pistol for a few thousand roundsand Ive only needed to wipe it down with some cleaner and microfiber cloth. Check out Rainier Arms Nitride BCG which meets or exceeds mil-spec. Anderson Manufacturing - M16 5.56 Bolt Carrier Group. Finish: Nickel Boron Additional Features: Full Auto M-16 , Holes for Reduced Weight Weight: 10.5 oz Code: 2A8-BCG-STBCGSP-ST5BG05 MPN: ST5BG05 UPC: 855319005518 Free Two Day Shipping $250.00 Save 10% $225.00 Free shipping* & free returns* Expert AdviceRFQPrice Match Add to Wishlist Product Info for Spikes Tactical M16 Bolt Carrier Group Facebook; Instagram; . Another recent addition from the makers of the most hi-tech AR-15 muzzle brakeone thats 3D printed from Inconel (think rocket ship engines). Though, this is a relatively new phenomenon and some people prefer the tried-and-true 8620 and Carpenter 158 combination. None of the other finishes (Nitride, DLC, Titanium Nitride, etc) will be chrome lined in these areas. Please check the headspace on every build. Otherwise I really enjoy your articles, thanks. LBE Unlimited 5.56 Nickel Boron Bolt Carrier Group for AR-15 Only $ 169.99 View Product Faxon Firearms 5.56 Gunner Lightweight Bolt Carrier Group - Black Nitride Only $ 229.08 View Product Lantac AR-15 Enhanced Bolt Carrier Group - E-BCG Titanium Nitride .223/5.56 NATO Only $ 305.99 View Product Nickel Boron 5.56 Bolt Carrier Group (BCG) Rated 5.00 out of 5 $ 94.99 $ 79.00 $ 94.99 $ 79.00 Add to cart Quick View. It comes in at a much lighter 8.5 ounces (compared to a full auto 11.6 ounces). Odin works have been perfect in one of my grendels. It is an electroless nickel-based finish for steel, stainless steel and aluminum alloys that co-deposits sub-micron particles of PTFE (polytetrafluoroethylene), otherwise known as Teflon, with electroless nickel. Full auto semi auto comparison. Farkosh, I am with you on this. But now you have aggressive weight-reducing cuts like with the Faxon Lightweight BCG. It is a surface treatment that unlike coatings will never chip or flake off. For these reasons, it is a very popular AR-15 BCG finish. Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. what makes them better than Colt,Bcm because they might be easier to clean? I have several spare bolts and don't need an extra. Lantac is very high quality, tough as hell, and highly sought after. Chrome is extremely hard which makes it very wear resistant. It must properly contain the high chamber pressures of the 223/556 . Semi-auto versions used to be significantly cheaper than FA versions, but now the difference isnt as drastic. I also agree with a lot of others here that cryptic coatings should be considered, they are the slickest bcgs I've ever used with the lowest friction on the market. Go to NICKEL BORON NICKEL BORON. Share your e-mail with us to receive regular sales, offers, and promotions. Each one of them have their place whether it be light weight for competition ARs or ones that work better for silencer use. Sale! Brownells is your source for Chameleon Nickel-Boron Bolt Carrier Groups,Bolt Parts at Brownells parts and accessories. 9mm Ramped Bottom Bolt Assembly BCG - Colt Compatible - Closeout! You, personally wont notice the difference between performance of either steel. The Massad Ayoob Group (MAG) Qual is This. Hi, I'm Eric Hung and I got into guns when I was around 25 and started with YouTube videos, scouring forums, and eventually taking a bunch of classes. Rich, I'm one of those aforementioned "newbies." It has a 9310 bolt but that is the standard for lightweight builds. DEAD FROM OVERDOSE OF SEMEN AND ASPIRATION OF JIZZ TO LUNG CONTACT Now we have again arbitrarily wrote one penis per mouthed BATFE member per load no penis shall be rendered to fire jizz while stand by penis is about to come under section 55.7 or 88.5 hence double loads of jizz or double or more PEENIS shall show intent on rapid fire guzzling of jizz or rapid mouth-ing offing of more than one (1) male penis regardless of girth, length ethnicity of male attached to or color of nor should sack containing balls or other devices be so attached nor this BATFE agent shall be considered rapid necking off of multiple penises and renders automatic mouthing offing of penis punishable by no less than ten (10) years maximum rectum stretching and fine no less than $250,000 (quarter million) or BATFE agent has had prior citation for choking upon or had sticky throat closure from inhalation of semen, but, juzz, jizzum, man paste or chowder OR ANY OTHER BY NAME FORM OF SPERM FROM PENIS ON ALIVE INDIVIDUAL THE PEOPLE RESERVE THE RIGHT TO MAKE QUICK CHANGES TO THIS DOCTRINE ST ANY TIME IN ORDER TO MEET OUR NARRATIVE OR BECAUSE WE HAVE WIVES AT HOME ON THEIR PERIOD VERY TUFF OR WE SIMPLY NEED TO APPEAR BUSY OR FUNDS BY WAY OF GRANT S OR DONATIONS ARE NEEDED TO FUND A COCAINE L, WEED, ALCOHOL AND PROSTITUTE PARTY THAT WE ARE THROWING OR BECAUSE WE ARE MAKING A STATEMENT TO PLEASE OUR FEMALE MISTRESSES OR ANY REASON WE WANT ETC.. The heavier standard BCGs are better suited to running any kind of ammo through any kind of gas system. Add to Wish List Add to Compare. The reason I decided to post here has to do with tolerances of different aspects and of degrees of temper and the utility of intentional variable of the former or later. Nickel Boron is easy to find today while Chrome is hard to find and generally more expensive. PewPew, itd be great if you could do an article about headspace, its importance, and how to check it. Toolcraft is an OEM provider of BCGs to many firearms manufacturers. 158 Bolt: Shot Peened Mag Particle Inspected: Yes. Of all AR15 parts, the bolt carrier group is without a doubt the most critical component for proper functioning. They are both winners, go with the finish that gives you the finished look you want. The 308 carrier is precisely machined from case-hardened 8620 alloy steel. Check out our NEW Stainless Steel FLUTED HBAR 16" Barrel. Cryptic is the best Ive ever used as well. you a link to reset your password. Weve got a dedicated section for the AR-15 here. Had never heard of them. Mil Spec is a Specification. Both are superior finishes with distinctly different looks. All this NiB and no mention of the Young Manufacturing chromed M16 BCG and bolt? Nickel Boron (NiB) used to go for a lot more in price but now theyve stabilized at around the BCM pricepoint. All the high pressure bolts like JP Enterprises are made with 9310 and state its stronger than C158, which is just mil-spec (the minimum standard). As someone who's tactically thrifty, I've only used Toolcraft BCGs in my builds(*), and have never had a problem. All laws subject to our interpretation and are arbitrarily drafted no matter what they actually say. , Whats the Difference Between a Full Auto and Semi-Auto Bolt Carrier Group? The BATFE now needs to suckle up to a penis that they can all share like good gobblers of knob. The fact that no Cryptic Coatings BCGs are here means the whole article is useless, There will only be one bolt that I will use for the future, and it comes from Sharps. It has an attractive gray graphite-like appearance. I've found NiB & TiN BCGs for $100 & $120, respectively. Some people like the rough phosphate finish for its tendency to hold oil better than other finishes. The 308 Relia-Bolt is made of robust 9310 nickel-chrome-moly alloy steel. The Best Black BCG Finish - Phosphate vs Nitride vs DLC. If you are looking for the perfect AR bolt carrier group for sale, Omaha Outdoors carries the 9mm, AR-10/AR-15 BCG and much more for low online prices! (, We noticed that you have previously logged in with your, Check what do you get by creating an account, Bookmark and compare your favorite firearms, 13 Best AR-15 Bolt Carrier Groups (BCG) [Hands-On], Low-mass or lightweight bolt carrier groups are relatively new on the market. Popular seach, Category FFL orders are delayed 7-8 business days from receipt of FFL license. Toolcraft Diamond DLC BCG - The Best BCG Ever Made? Fabulous company and pricing too. Some advantages of phosphate over chrome include its lower cost and less visible appearance in a military setting - less shiny. Bolts, Carriers & BCGs (Bolt Carrier Groups), 17-4 H-900 Stainless Steel or Hard Chrome Firing Pin. This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. This coating offers unfaltering protection from wear and corrosion that would ordinarily degrade . My understanding is they are OEM for BCM BCGs. johhny B and his boys standing on the corner sucking that corporate dick again. Runs better than BCM (which I love), at al slightly lower price point. Also NiB has less friction does not mean it does not need lube. I got an LMT BCG in my main AR that hasnt had an issue yet and I have a lightweight VDI BCG that has their Lifecoat coating and the gas key is actually integrated into the BCG so there are no screws that can loosen or need to be staked. At that point it's a Nickel Boron (Silver) vs Titanium Nitride (Gold) discussion and that's a discussion for another day! You'll now receive newsletters of our best articles on techniques, Here are some of the important bits: See that high pressure tested and magnetic particle inspected above? M16 Complete Bolt & Carrier Group - Nickel Boron, AR15 Complete Low Mass Bolt & Carrier Group - Nickel Boron, AR15 Complete Low Mass Bolt & Carrier Group - Nitrided, Del-Ton AR15 MP/HP Tested Bolt & Carrier Assy, Del-Ton M16 MP/HP Tested Bolt & Carrier Assy BCG, Fostech AR15 M16 Bolt Carrier Group Black Nitride - 6226 ** LAST ONE, FosTech Complete LOW MASS Bolt Carrier Group (Nickel Boron), Odin Works 6.5 Grendel Type 2 Black Nitride Bolt Carrier Group, Anderson MFG AM-10 .308 Bolt Carrier Group, AR10 .308 Complete Low Mass Nitride Bolt & Carrier, 6.8SPC/224 Valk M16 Complete Mil-spec Bolt & Carrier - Nitride, Anderson Mfg .458 SOCOM Bolt Carrier Group, Angstadt Arms AR15 5.56 NATO Complete Bolt & Carrier Group QPQ Black Nitride Finish, AR15 .450 Bushmaster/.458 SOCOM Bolt Carrier Group, AR15 7.62x39 Complete Bolt & Carrier - Nitride, Black Rain Ordnance .308 AR Complete Bolt Carrier Group -Nickel Boron Coated NIB Finish, Brownells M16 5.56 MP Chrome Bolt & Carrier, Colt Manufacturing M16 5.56 Complete Bolt & Carrier, Faxon Firearms 5.56 M16 Bolt Carrier Complete, Chameleon PVD, Guntec AR15 Complete Mil-Spec Bolt Carrier Group (Rainbow Pvd Coated), Guntec AR15 Complete Mil-Spec Bolt Carrier Group (Titanium Coated), JP Enterprises 308 SS LMOS Carrier Group w/ JP Enhanced High Pressure Bolt (DPMS Platform) - Polished Finish, JP Enterprises 308 SS LMOS Carrier Group w/ JP Enhanced High Pressure Bolt (DPMS Platform) - QPQ Black Finish, JP Enterprises Full Mass Stainless Carrier with Key, JP Enterprises Low Mass Polished Stainless Carrier with Key installed, JP Enterprises Low Mass Stainless Carrier with Key, Lefty Complete Bolt & Carrier Group - Nitrided, Midwest Industries AR15 Bolt Carrier Group - Black Nitride, Stern Defense SD BU9 NiB ECHO - Glock Compatible, Powered by Network Solutions Online Store.