Toolcraft AR15 MIL-SPEC 5.56 Bolt Carrier Group – Nickel Boron

(13 customer reviews)

$119.99 $109.24

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SKU: TOOLCRAFT-556-NB-BCG Categories: ,


Toolcraft BCG Nickel Boron 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: Nickel Boron

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

Cam Pin:
8620 steel
Finish: Nickel Boron

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

13 reviews for Toolcraft AR15 MIL-SPEC 5.56 Bolt Carrier Group – Nickel Boron

  1. James B. (verified owner)

    Excellent quality and extraordinarily fast shipping! Will definitely do business here again!

  2. David M. (verified owner)

    Always great prices and fast shipping! Love supporting small businesses and our vets!

  3. Charles K. (verified owner)

    This is slick, and looks great. I was happy to find out that Toolcraft makes BCG’s for Spikes and Daniel Defense. Haven’t run it yet, but expect good performance.

  4. John M. (verified owner)

    Fast service, great product as expected

  5. Frank P. (verified owner)


  6. Brandon W. (verified owner)

    Have 3 of these (2 in 5.56 and 1 in 6.5 grendel type II), stays clean longer than nitride and have never had any issues.

  7. Terry V. (verified owner)

    This BCG is smooth as silk – love it!!

  8. Bradley A. (verified owner)


  9. Chris Kwiatkowski (verified owner)


  10. Nicholas D (verified owner)

    Excellent bcg. Well made with a nice nickel boron finish.

  11. Benjamin M. (verified owner)

    Good quality BCG especially for the price.

  12. Bret S. (verified owner)

    Smooth as glass

  13. Adam Sailer (verified owner)

    Great quality, indistinguishable from the AP NiB BCGs that I have purchased.

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