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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 Toolcraft NiB BCG. Great communication
FAST Shipping. Will buy here again!!

04/12/2021

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

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Toolcraft AR15 BCG Nickel Boron Bolt Carrier Group

  • Brand: Toolcraft
  • Product Code: TOOLCRAFTBCGAR15NIB
  • Availability: In Stock
  • $369.95
  • Free Shipping

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