MPI Bolt (Magnetic Particle Inspected)
Carpenter 158 steel bolt (Black Nitride)
Shot peened firing pin
Grade 8 hardened fasteners
8620 heat treated carrier, polished w/black nitride coating
Key staked per Mil-Spec
No returns taken on bolt carrier groups. If defective, we will arrange shipment and return to manufacturer representative for inspection/repair or replacement. Void if fired with reloads or if rifle is not assembled by a manufacturer or gunsmith.
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