USED FM Products Glock Style .45 AR Bolt Carrier Assembly Black FM45-BCG

USED FM Products Glock Style .45 AR Bolt Carrier Assembly Black FM45-BCG. This Premium 45 Cal Bolt Carrier Assembly is compatible with all 45 Cal Pistol Caliber AR builds. Maintaining a harder core than standard 8620 steel this carrier is machined from Premium 4340 Steel. The outside diameter is precision ground prior to machining in a per-hardened state for improved tolerances post machining and coating. A long duration salt bath nitride finish is applied for a long service life and superior co