AR15/M16 - 5.56/223 C158 Bolt Carrier Group Nitride (Mil-spec bolt)
Carrier made with 8620 Steel and bolt made from mil-spec Carpenter 158 Steel. The nitride coating is the strongest plate available, it's the same protective finish that's used in gun barrels and CNC tool protection. If you're looking for a bolt carrier that's going to hold up against the roughest conditions then this bolt carrier group is the one for you.
- C158 Bolt (mil-spec)
-Bolt Laser Engraved with "C158 MPI"
- AR15 and M16 Compatible
- 5.56 / 223
- 8620 Steel Carrier Nitride Coated
- 4340 Steel Cam Pin Nitride Coated
- 4140 Steel Gas Key Nitride Coated
- Tool Steel Extractor Nitride Coated
- Shot Peened
- MPI (Magnetic Particle Inspected)
- HPT (High Pressure Tested)
- Gas key staked to Mil-Spec Standards
- Grade 8 Hardened Fasteners
- Extractor Insert with upgraded Crane O-Ring
- Power Spring Kit
