PSA 5.56 NITRIDE MPI FULL-AUTO BOLT CARRIER GROUP - 516446953

PRODUCT DETAILS DETAILS Manufacturer: Palmetto State Armory Platform: AR-15 Bolt Finish: Nitride Bolt Steel: 9310 Profile: Full Auto Profile Gas Key: Grade 8 Hardened Fasteners, Staked per MilSpec FEATURES PSA 5.56 nitride MPI full-auto bolt carrier group. Bolt is Magnetic Particle Inspected (MPI). 8620 Full-auto profile bolt carrier group with 9310 steel bolt. Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec.