Guntec Bolt Carrier Group - Mil-spec Nickel Boron Finish!

Guntec bolt carrier group mil-spec nickel boron finish!

FEATURES:
-8620 Steel Bolt Carrier
-Nickel Boron Finish
-9310 Bolt MPI
-Hydraulically Staked CL Key
-Grade 8 Screws to Mil-Spec
-Heat Treated for Heavy Duty use

Other Features: 8620 steel bolt carrier 9310 steel bolt mil-spec design nickel boron made in usa