AR-15 / M4 Enhanced Bolt Carrier Group


(20 customer reviews)

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The Blacklist Industries AR-15 / M4 bolt carrier group (BCG) takes reliability and performance to a higher standard. The design was created to reduce carrier tilt/cant during recoil and increasing reliability by strategically relocating key bearing surfaces. The enhanced carrier has fewer points of contact resulting in less friction and keeps debris from interfering with function. The slight increase in carrier mass extends dwell time and ensures proper gas pressures for a reliable extraction.

  • Carrier Material: Case Hardened 8620 Steel
  • Gas Key: Billet Machined 4130 Steel, attached with Grade 8 hardware and properly staked into a milled “valley” to ensure proper positioning
  • Ejection Port: Area is milled with added material for more strength and rigidity
  • Cam Pin: Hardened 4340 cam pin
  • Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated
  • Full billet machine construction with ultra-tight tolerances
  • Finish: Black Nitride. Metal components treated with Black Nitride have increased wear-resistance, fatigue strength, corrosion resistance, and reduces the need for lubricants. Black Nitride has proven to be superior to many other applications on the market today (NiB, Phosphate, Chrome, etc)

Bolt Assembly: The Bolt is “true” Mil-Spec dimension and external surfaces are CNC ground after heat treat for a precision fit.

  • Material: Case Hardened 9310 Steel, Shot Peened
  • Finish: Black Nitride coated
  • Extractor: 4340 Steel, Manganese Phosphate coated, Mil-Spec Extractor Spring, O-Ring
  • MPI: Magnetic Particle Inspected
  • HPT: High Pressure Test
  • Weight: 11.4 oz
  • Bolts are lot tested under MIL-STD-1816 for both HPT and MPI
  • Carrier fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm, 300Blkout, 6.8SPC

Lifetime Warranty


Buy our AR-15 / M4 Bolt Carrier Group or click here to view all of our Black Rifle Parts.

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20 reviews for AR-15 / M4 Enhanced Bolt Carrier Group

  1. Earl Barcome (verified owner)

    Too good … quality, service, shipping … purchased 2 BCG’s for customer work. Guranteed satisfaction for them and me.

  2. Will (verified owner)

    Great quality and fast shipping. Would definitely buy another next time I need a bcg.

  3. Jeff (verified owner)

    Simply the best BCG I have ever used in a build. Has never jammed. 6k rounds later, still works flawlessly.

  4. Michael M.

    This thing is flawless. Absolute beauty thanks for a great product

  5. Francisco V.

    Definitely the best BCG I have ever held. I wish I would have bought one when they were making TiN finishes.

  6. Mark T.

    This BCG is truly a quality piece. The finish, the feel, and the function are second to none. The customer service was great, it arrived in a quick and timely manner, and I wouldn’t hesitate to do business with Blacklist in the future.

  7. Cameron

    I decided to use this BCG for my first rifle build and the quality reflects the attitude and customer service of the company, in short the BCG kicks ass and I’ll use their products in any other builds I do down the line.

  8. Jackson F.

    Top notch quality BCG, super smooth. Love it!

  9. Thomas M.

    Fresh out of the package its a beautiful piece, after looking it over for imperfections i threw it in my rifle and it slid smoothly with no rough sounding scuffs or loose jiggling, took it to the range and put a hundred or so rounds on it and it performed flawless . Great work from blacklist again!

  10. Cody S.

    Awesome quality, looks great as well. I definitely trust blacklist industries for anything they make 100%.

  11. Dillon H.

    Threw this guy in my problem build out of desperation, still having a rifle that beat itself up even with an adjustable gas block. The moment I put this bolt in and re-adjusted the gas block and shot for the first time, the recoil was gentle, the ejection as perfect and the gun stopped gnawing it’s buffer. Great product, I’ll be buying more for my fleet of rifles.

  12. Lucas L.

    I tried to run a bargain priced bolt from a different well known company also based out of South Carolina and had major feed problems and failure to lock the bolt back when empty. This bolt literally fixed my rifle! Zero issues after my first 1000 rounds using different ammo manufacturers and grains. I had the luxury of breaking down this bolt for cleaning and compared it to my Big name bargain brand bolt and the difference in quality is astounding. Customer service was great, less than 2 days from ordering to delivery. Money well spent.

  13. Paul G.

    Just finished the build and have not yet used the bcg. The fit an finish of this is exceptional.

  14. Robert H.

    The Blacklist Enhanced Bolt Carrier Group is the literal best in the world, utilizing an enhanced carrier paired with an HP/MPI bolt precision machined to mil-spec dimensions. These BCG’s are the highest in quality, offering everything you could ever need and nothing you don’t. In my person rifle this BCG is matched to a mid-length gas system and Geissele Automatics Super 42 Buffer and Spring. The extractor and ejector are consistent and create neat little piles of brass. These BCG’s are perfect for any rifle but especially shine in premium blasters.

  15. Matt L.

    Sleek and smooth. Looks badass and performs as expected. Shot over 1000 rounds with zero problems and hardly any lubricant.

  16. Cody P.

    I own two of the blacklist bcgs. One has roughly 5k on it and the other around 1k. However both rifles are shot more suppressed than not. Bcg has never given any issues always functions even when it’s gunnked up and I should pressure wash the whole rifle. Highly recommend for anyone needing to replace a bcg or put in a new build. Everything on the carrier is to spec and the staking is just right. Plus one you start using Blacklist products in your firearms you and your gun go way up in sex appeal. We all know what that means!

  17. Kevin King

    First ar build and wanted quality parts. So to the web I went to see what was out there. Came across blacklist and liked what I saw. So I ordered this bcg. After the pain staking process of waiting for the package to arrive, it finally came in and I was not disappointed. Fired the first shot and instant freedom boner. I would highly recommend this bcg to any freedom loving American. Thanks for the quality parts blacklist.

  18. Joe R.

    Shot 200 rounds first time out to the range. Ran flawless! Does not foul up at all and wipes clean with no effort. Absolutely love it! Highly recommend if you’re looking for a quality BCG. Thanks Blacklist Industries!

  19. jason l.

    Works great and looks great

  20. Aaron Norvell

    Way back when on that day my son Blacklist dropped his BCG few years ago I knew I had to have one. It has run flawless in all of my rifles. Even the shorties and quiet ones with no issues. Since that day he has released these newer badass BCGs that are even better!! @the_gun_nation