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223 Remington/556NATO BCG, Manganese Phosphate Finish, Black

Sons of Liberty Gun Works looks at the bolt carrier group as the heart of the gun. If the gas

AR15 Receiver End Plate

LBE Unlimited, End Plate, For AR-15, Manganese Phosphate Coated 4140 Steel Fits AR-15 Magnesium Phosphate Finish Made in the USA

C4 Bolt Carrier Group Phosphate

Centurion Arms Bolt Carrier Group Centurion Arms C4 Bolt Carrier Group was created with HP/MPI tested bolts and marked to