Msr Bolt Carrier Group, Packaged, 5.56-300Blk
MSR Bolt Carrier Group, Packaged, 5.56/300BLK
F/A, Nickel Boron coated, proprietary cam pin travel path, properly staked carrier key with Permatex, Carpenter 158? bolt 5.56/300BLK
F/A, Nickel Boron coated, proprietary cam pin travel path, properly staked carrier key with Permatex, Carpenter 158? bolt 5.56/300BLK
