Toolcraft AR15 MIL-SPEC 5.56 Bolt Carrier Group – Nitride

(35 customer reviews)

$99.99 $86.24

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Toolcraft BCG Black Nitride AR15 / M16 Auto Bolt Carrier Group 9310 MPI Tested

All manufacturing and coating is done by Toolcraft.

100% Made in USA and includes Lifetime Warranty from Toolcraft. If ever a problem, simply call Toolcraft and they will take excellent care of you with their no questions asked Lifetime Warranty.

Bolt Assembly:
​Bolt: AISI 9310 alloy steel
MPI Inspected
Extractor: Shot Peened Hardened D2 tool steel
O-Ring: Mil-Spec
Gas rings (3): Mil-Spec
Finish: Black Nitride

Bolt Carrier:
8620 steel
Heavy Duty M16 design
Grade 8 Gas Key Screws, Staked
Gas Key Material: 4140
Finish: Black Nitride

Cam Pin:
8620 steel
Finish: Black Nitride

Firing Pin:
mil-spec firing pin made from centerless ground 8740 steel, hard chrome coated

Additional information

Weight .85 lbs
Dimensions 8 × 4 × 4 in

35 reviews for Toolcraft AR15 MIL-SPEC 5.56 Bolt Carrier Group – Nitride

  1. Paul Erickson

    If you want a solid bcg that is easy to clean without the cost of NiB this is it. Bkingsfirearms and Aero performs!

  2. Jordan K. (verified owner)

    great price on this BCG for my budget upper build, works great and fast shipping

  3. jhstahl99 (verified owner)

    Great BCG with an AWSOME finish cleans up nice and quick.

  4. Anonymous (verified owner)

    BCG looks great, I have yet to fire the gun.

  5. Colten (verified owner)

    As a BCG should be. Staking was okay, not my most favorite but zero issues.

  6. George S Potter (verified owner)

    Awesome BCG. Coating is superb and staking is perfect. Several hundred rounds down range without issue. Easy to clean.

  7. Rafed K. (verified owner)

    Great product.

  8. Jesse H. (verified owner)

    Solid BCG from Tool Craft and paired with a no questions asked lifetime warranty it’s hard to beat for the price. I would however note that the staking could have been better. Only time will tell if the gas key will move. Overall, solid thus far.

  9. Jeremiah G. (verified owner)

    Cant get much better for the price

  10. Cyrus (verified owner)

    Absolutely awesome value. Seriously just buy one as a spare if you have the extra dough.

  11. Adam (verified owner)

    Nice bolt carrier group for the price

  12. Kendrick (verified owner)

    Awesome experience. Walked me through my purchase, unbeatable pricing, fast shipping and even fully assembled my upper. Can’t wait to build another one.

  13. John M. (verified owner)


  14. Eric S. (verified owner)

    Tooocrafts bcgs are great quality and work great!

  15. joseph y. (verified owner)

    Product is reasonably priced and amazingly fast shipping, very impressed with this website

  16. Griffin (verified owner)

    Great quality for a very good price. No issues whatsoever. B. Kings had the best price by far and always has fast shipping and great service.

  17. Mathew (verified owner)

    BCG looks good haven’t installed yet

  18. Justin C. (verified owner)

    Nice, smooth Toolcraft bolt at a great price. What’s not to love??

  19. Gilles M. (verified owner)

    Toolcraft, enough said! Excellent price to boot.

  20. Gabriel Bryan (verified owner)

    Some packaging and description of the bcg would be good but otherwise solid product

  21. Matt M. (verified owner)

    Flawless BCG, this is the 3rd one i’ve bought and they’re always perfect.

  22. Jefferey P. (verified owner)

    Worked perfectly.

  23. JOSHUA KONEY (verified owner)

    Fits and functions like it should

  24. Robert S. (verified owner)

    Typical high Toolcraft quality at a great price. Great customer service from B Kings as always

  25. Brendan (verified owner)

    Amazing bcg for a great price.

  26. Anonymous (verified owner)

    Toolcraft makes a nice bolt carrier.

  27. Michael C. (verified owner)

    Toolcraft BCG’s have become my go to in my builds. Great price as well.

  28. Brad (verified owner)

    Never had a problem with Toolcraft

  29. Tyler F. (verified owner)

    My go to BCG, works great.

  30. daniel_jenkins (verified owner)

    Excellent BCG, best kept secret in the firearm community right here. Those in the know use toolcraft.

  31. Richard W. (verified owner)

    Nice finish and fits/functions flawlessly.

  32. Nicholas E. (verified owner)

    The price was right, and I picked one up for my pistol build.

    Processing was fast, shipping was fast, and I received exactly what I ordered.

  33. Baron Buehler (verified owner)

    It’s toolcraft what’s not to like.

  34. John Tellen (verified owner)

    Good finish

  35. Tom G. (verified owner)


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