AR15/M16 - 5.56/223 C158 Bolt Carrier Group Nitride (Mil-spec bolt)
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AR15/M16 - 5.56/223 C158 Bolt Carrier Group Nitride (Mil-spec bolt)

$99.95
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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

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