http://karrisguns.com/kg-ar15-bcg-5-56-223-300-blackout-mpi-nitride-bolt-carrier-group.aspx
Not too shabby based on specs.
KG AR/M16 5.56/.223/.300 BLACKOUT caliber complete Black Nitrided Bolt Carrier Groups.
We are having these bolts manufactured to our exacting standards
Features:
Nitride QPQ Finish
Shot peened, MPI (Magnetic Particle Inspected)
9310 Tool Steel Bolt; 8620 M16 carrier
Properly staked 4140 Machined Gas Key fastened with Hardened Grade 8 Fasteners.
Made in the USA
Not too shabby based on specs.
KG AR/M16 5.56/.223/.300 BLACKOUT caliber complete Black Nitrided Bolt Carrier Groups.
We are having these bolts manufactured to our exacting standards
Features:
Nitride QPQ Finish
Shot peened, MPI (Magnetic Particle Inspected)
9310 Tool Steel Bolt; 8620 M16 carrier
Properly staked 4140 Machined Gas Key fastened with Hardened Grade 8 Fasteners.
Made in the USA
