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Wilson Combat TRBCA Bolt Carrier Assembly 5.56mm Steel Black Parkerized
The Wilson Combat bolt is precision machined from Carpenter No. 158 steel, shot peened for increased strength and a includes a tool steel extractor and ejector, appropriate extractor spring, and is MPI (Magnetic Particle Inspected) and randomly batch HPT (High Pressure Tested). The extractor is 4140 gun quality, annealed, cold drawn steel per the Mil-Spec. Parkerized externally and internally chrome lined the 8620 steel carrier includes a proper machined Mil-Spec gas key that is chrome lined, phosphated and heat treated per GI specifications. It is secured to the carrier via Grade 8 fasteners and properly staked in Wilson's shop during final inspection. These precisely machined, finished and hardened parts will ensure long term proper gas system functioning and reliability.
Type: Bolt Carrier Group
Model: TR-BCA
Finish: Black Parkerized
Size: 5.56mm
Material: Steel

Manufacturer: Wilson Combat
Mfg Number: TRBCA
Model: Bolt Carrier Assembly
Purpose; Replacement
Series: 5.56 NATO Parkerized