Toolcraft

TC556NIT-158

Toolcraft Black Nitride BCG C158

69   |  
  • Toolcraft makes some of the best AR15 bolt carrier groups on the market today. Precision manufactured on state-of-the-art CNC machinery in North Carolina, Toolcraft products are trusted by the U.S. Military and carry a lifetime warranty.

    A bolt carrier group is only as good as it’s bolt. This bolt is manufactured from Carpenter 158 steel, the same high strength steel that is specified by the US Military for M16 bolts. Also see our 9310 steel Black Nitride BCG.

    Finish is Black Nitride which is a metal treatment that produces a case-hardened surface. The resulting finish is extremely wear and corrosion resistant and very slick. This means less friction and smoother, more reliable function. The rich black color on these BCGs looks fantastic and cleans up much easier than a phosphate finish. Also see our Nickel Boron BCGs. See all AR15 parts.

    This is a 223/5.56/300 Blackout bolt carrier group.

    This AR BCG will not work with 6.5/6.8/308 etc.

    Buy with confidence! 30-DAY NO-HASSLE RETURNS.

  • Bolt Shot Peened; MPI
    Bolt Material Carpenter 158 Steel
    Bolt Finish Black Nitride
    Caliber 223/5.56/300 Blackout
    Extractor O-ring Viton; Mil Spec
    Carrier Material 8620 Steel
    Carrier Finish Black Nitride
    Carrier Design M16 Full Auto Style
    Gas Key Material 4130 Steel
    Cam Pin Material 4140 Steel
    Cam Pin Finish Black Nitride
    Firing Pin Material 8740 Steel; Hard Chrome Plated

Customer Reviews

Based on 69 reviews
5 Star
99% 
68
4 Star
1% 
1
3 Star
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Neal B.
United States
10/04/2018

Very Pleased

Works great in my new build!

Tom D.
United States
09/30/2018

Great experience

Extremely fast service, great price. Will definitely do business again and highly recommend.

Thomas D.
United States
09/30/2018

Toolcraft BN BCG

Beautiful BCG. Fits perfectly in my Aero Precision upper. Would buy again. Quick processing, fast shipping!

Jason S.
United States
09/26/2018

5 Stars!!

Fast shipping! Excellent customer service!!

DAVID C.
United States
09/25/2018

Great product, great price, great company

Great product, great price from a great veteran owned company. I'll be back.

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