Angstadt Arms 5.56 Bolt Carrier Group Assembly

(24 customer reviews)

Mil-spec 5.56 complete bolt carrier group assembly finished in black nitride.

Original price was: $139.99.Current price is: $124.99.

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SKU: AA56BCGNIT Categories: , ,

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The heart of a reliable AR-15 build is a quality 5.56 bolt carrier group assembly. These are the same high quality BCG’s we make for law enforcement and military groups around the world. Machined to mil-spec dimensions and finished in a beautiful black nitride finish, this bolt will continue to run and looks great doing so.


  • Machined from 8620 alloy steel with a QPQ black nitride finish
  • 5.56 Bolt is machined from Carpenter 158 tool steel
  • High pressure tested (HPT) and magnetic particle inspected (MPI)
  • Shot peened
  • M16-cut/full auto capable carrier
  • Properly staked gas key secured to the carrier with grade 8 fasteners
  • Carrier has forward assist serrations
Weight .81 lbs
Dimensions 11 × 3.9 × 1.5 in

Angstadt Arms


Angstadt Arms

24 reviews for Angstadt Arms 5.56 Bolt Carrier Group Assembly

  1. Ron S (verified owner)

    Great price and service

  2. Lance H. (verified owner)


  3. Michael T. (verified owner)

    This was the BEST PRICE and I trust Angstadt Arms!

  4. bootss (verified owner)

    High quality,well functioning

  5. James B. (verified owner)

    Great product and price! Lightning fast shipping!! Thank you Angstadtarms!

  6. Lou D (verified owner)

    Great price. Quick turn around. Buying more items as I write this!

  7. Josh H. (verified owner)

    Great product and fast shipping

  8. Darren G. (verified owner)

    Great craftsmanship, operates flawlessly, bought two more the next day, received the item fast . I recommend this item.

  9. Mike (verified owner)

    Top notch. Has everything you’re looking for: carpenter steel, HPT and MPI. At a REAL price.

  10. Alex (verified owner)

    Great machining, perfect finish, works great!

  11. Daikon B. (verified owner)

    Great product, price, and delivery time!

  12. Daniel M. (verified owner)

    Very nice thank you

  13. Justin O. (verified owner)

    super smooth bcg. I found one in a mom and pop in podunk where ever Ville bout a year ago. It quickly became my most favorite. This dude outperforms everyone I have ever had. Def recommend,not because it’s reasonably priced, because it’s the best. Hands down. If anyone says anything different they don’t know what they’re talkin about.

  14. Larry (verified owner)

    Very nice, very well built. Have not installed it yet but soon. Looks to be a better BCG than my Aero Precision I purchased years ago.

  15. apmm (verified owner)

    Excellent ! Beautifully machined and finished. Very quality part.

  16. Roger M. (verified owner)

    It fit. Looks good. Works good too. Love it.will get another

  17. Mike (verified owner)

    High quality AR15 bolt carrier assembly (machining, finish, and assembly); and at a competitive price. Repeat customer!

  18. Bill J (verified owner)

    Was having a hard time finding a BCG during the panic buying and came across these. They had just came back in stock so I didn’t hesitate and ordered one….a decision I do not regret. Very high quality craftsmanship. I now have over 2000 rounds through the first one I purchased and it still performs the same as when I purchased it.

  19. Justin E.

    I’ve been running this BCG in my Ar pistol for bout four years now few thousands rds later no problems and it’s still running stronger then ever you guys rock and makes dang good Products

  20. Chris C

    Excellent Quality and Price Runs Flawless in My AR-15

  21. Shane Revels (verified owner)

    Have t shot with it yet but over all quality and value was spot on. Got it for a 300 blk out build. Seats snug with my Faxon barrel too which I like. I know it’ll break in but overall I’m really glad I purchased this bcg over other manufacturers.

  22. bryan g (verified owner)

    mmmm smoooth like buuuuttterrrrr

  23. Cynthia (verified owner)

    When I do an AR-15 build, the very first thing I purchase is the BCG from Angstadtarms. The BCG is very high quality that I trust and depend on. All of Angstadtarms products are built to last.

  24. Harold Waig (verified owner)

    I bought 9mm bcg for My Aero9mm Build and work great..
    And Because of that i am building a 300 blackout and using a Angstarms AR15 bcg for it. Thanks

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Exceptional Firearms, Craftsmanship and Innovation

Angstadt Arms is born from a rich heritage of master gun makers, a family legacy spanning centuries, now reimagined with innovation and technology. We believe every gun owner is part of a grand story and we invite them to add a new chapter with us.

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5.56 Bolt Carrier Group
Angstadt Arms 5.56 Bolt Carrier Group Assembly

In stock

Purchase & earn 125 points!