Toolcraft Nickel Boron Bolt Carrier Group - MPI Bolt - M16 Carrier This Toolcraft Nickel Boron BCG comes with a lifetime warranty and is perfect for any AR15, M4 or M16 Build. Toolcraft carriers and bolts are build to military specifications, also known as "Mil-Spec" and they are known throughout the industry as some of the best.



Toolcraft Bolt Carrier Groups come with a lifetime warranty!



Enhanced 9310 Steel (Bolt)

8620 Tool Steel (Carrier)

Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring

Tool Steel Extractor

Shrouded Firing Pin

Mil-Spec Gas Key (4130 Steel) attached with Grade 8 hardware and Properly staked

Caliber: .223 / 5.56 / 300 Blackout

Bolt is shot Peened and MPI

Toolcraft has all BCG components pre polished before being plated by UCT and then post polished for an incredible shine.

All of our Toolcraft BCG's come assembled from TC. We do nothing to them other than inspect them and put them on the shelf for sale! Be wary of other companies that purchase just carriers from Toolcraft and then assemble BCG's with random bolts! Even worse, some companies get their carriers raw and use inferior plating or coating