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Toolcraft BCG Nickel Boron AR15 / M16 Auto Bolt Carrier Group 9310 or C158 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 or C158 
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

Great product and great customer service. Overall really satisfy with purchase, highly recommended

01/15/2020

Just received my 4th Tool Craft nickel boron BCG from Tom's. I am so impressed that I have replaced all my AR bolts with this Tool Craft model. It's works flawlessly. Smooth, easy to clean and needs little to no lubrication. And fast and free shipping.

01/12/2020

This will be my new "go to" bcg. So smooth and it looks cool too.

07/02/2019

Works and functions flawlessly, will definitely be purchasing another. Cleans up super easy as well. Tom's Tactical has amazing service and shipping is always super fast, I get stuff quicker from you guys down in Texas than I have from guys waaayyyy closer.

12/09/2018

Excellent smooth slick nickel boron finish. Looks like it will last forever. I'm new to the ar. Just finished my first build. Showed to experienced Shooters. They're impressed. Great price, free shipping, arrived in mail box 3 days from order. Oh yeah lifetime warranty. I'll be back.

11/08/2018

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Toolcraft AR15 BCG Nickel Boron Bolt Carrier Group

  • Brand: Toolcraft
  • Product Code: TOOLCRAFTBCGAR15NIB
  • Availability: In Stock
  • $239.95
  • Free Shipping

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