Each EWS BCG is built with milspec materials and processes, but held to tighter-than-TDP tolerances. Bolts are matched with carriers, ensuring a gas-efficient carrier every time.

Bolt – C158, shot-peened, MPI
Carrier – 8620
Extractor/Ejector – Tool steel, Sprinco 4-coil spring, with insert and 0-ring, phosphate coated to retain maximum grip
Gas Key – 4130, planed and Permatex sealed
Genuine Michiguns Optimized Carrier Key Screws (OCKS)