This BCM Bolt Carrier Group features an ion bond finish in flat dark earth for reduced friction and ease of cleaning. Machined to USGI specifications, the carrier has a chrome lined interior and heat treated gas key secured with properly staked grade 8 fasteners.
The bolt assembly is machined from carpenter No. 158 steel, shot peened for increased strength, and is high pressure tested and magnetic particle inspected. Includes tool steel machined extractor, ejector, and BCM extractor spring.
NOTE: All BCM bolt carrier groups are factory test fired. The BCG may show handling marks consistent with these quality control procedures.
- Ion bonded flat dark earth finish
- MIL-SPEC carpenter no. 158 steel (bolt)
- High pressure tested and magnetic particle inspected
- Shot peened bolt
- Chrome lined carrier
- Chrome lined gas key
- Gas key hardened to USGI specifications
- Grade 8 hardened fasteners
- Key staked per MIL-SPEC
- Tool steel extractor
- BCM extractor spring
- Black extractor insert
- MIL-SPEC crane O-ring