Toolcraft AR15 Nickel Boron Bolt Carrier Group 5.56/.223

Was: $149.99
Now: $94.99
(10 reviews) Write a Review

The ToolCraft Bolt Carrier Group is the “Heart of an AR-15.” The bolt carrier houses the bolt and resets the hammer as it moves within the upper receiver. The carrier also bears the brunt of the gas pressure during operation. This pressure moves it back to cycle the firing mechanism, and its performance is crucial to the proper function of your firearm.

 In addition to having an attractive chrome colored finish, the Nickel/Boron finished BCG has a low co-efficient of friction and is wear resistant. Due to the columnar structure of the Nickel/Boron, the ToolCraft NiBor BCG is naturally lubricious and hard (70C+, on Rockwell scale).

The ToolCraft Nickel Boron BCG is an M16 Full Auto (Preferred for most AR-15 builds)

  • 5.56 / .223 caliber
  • Bolt Carrier constructed from 8620 steel
  • Bolt constructed from 9310 steel
  • Gas Key constructed from 4130 Steel; Grade 8 Gas Key Screws
  • Mil-Spec O-Ring
  • Mil-Spec gas rings (3)
  • MPI inspected
  • Weighs 11.7oz
  • Made in the USA
  • Includes Lifetime Warranty from ToolCraft

10 Reviews Hide Reviews Show Reviews

  • 5
    toolcraft nb bcg

    Posted by b.t. on Jul 5th 2018

    even though I have colt and bcm bcg I was curious as to handling one of these nickel boron finishes,I decided on toolcraft based on their reputation the finish is excellent and I dropped it in to my

  • 5

    Posted by TARHEEL SHOOTER on Jun 1st 2018


  • 4
    Toolcraft NiB BCG

    Posted by Jim on Apr 25th 2018

    Just got this yesterday and still waiting for it's home to arrive (complete upper).

    This is my first AR build so take my comments for what that's worth (will update after a few rounds). First impressions are that it's slick as sh!t right out of the box and seems to be pre-lubed. Removed the firing pin, cam pin and bolt, and then the retainer. All came apart and went back together smoothly. No blemishes anywhere in the finish. Staking looks like it could be a smidge deeper, but makes contact with the screw heads so should be fine.

    Happy so far, especially for the price.

  • 5
    Best bang for your buck

    Posted by Brett on Apr 11th 2018

    Highly recommend this Bcg the price is right the quality is amazing I don't know why I didn't buy more than I did will be buying more in the future fast shipping too .

  • 5
    Keep up good work

    Posted by Meok on Apr 10th 2018

    Have not shot it yet but keep these at the 85-90 and you will sell millions!!!!!! I personally will return for more lots more ..

  • 5

    Posted by Eric on Apr 10th 2018

    Outstanding quality bcg. Super slippery coating. Super fast shipping too. Got it the same week I ordered it.

  • 5
    Can't be beat

    Posted by Cody on Apr 9th 2018

    Great quality product and at the best price, I have looked all over for the best deal and this was the lowest I have found a named brand nickel boron bcg. Easily recommended.

  • 5
    Fantastic BCG.

    Posted by Stephen on Apr 9th 2018

    Major upgrade from my nitride BCG. Smooth as butter and easily wipes clean. Fast shipping and good packaging.

  • 4
    Toolcraft NiB BCG

    Posted by TC on Apr 5th 2018

    Gave it a 4 star because I have not had a chance to test it out. The BCG looked and felt good. It was very smooth to the touch. I didn't see any blemishes in the finish. e-arms shipping was fast. Ordered in on a Tuesday morning, product arrived by Saturday afternoon. Not bad for free shipping.