Microbest Mil-Spec C158 HPT/MPI 5.56 Bolt Carrier Group – Phosphate/Chrome-Lined

From: $124.99



The Microbest BCG has been designed from the ground up with the most avid shooters in mind, using only the best materials available on the market today. The bolt assembly is machined from Carpenter No. 158® steel, shot-peened, MP marked, HP tested, and has a tool steel extractor that is machined from bar stock.


4340 Extractor spring, mil-spec insert and extractor retainer pin in mag phosphate
Mag phosphate ejector
Mil-spec stainless gas rings
8620 carrier in FA profile chrome lined
4130 gas key with grade 8 retainers and sealed
4340 cam pin in mag phosphate
8740 firing pin in hard chrome
1038 retaining pin in mag phosphate

Optional choice of upgrading to an enhanced extractor and ejector spring!


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