New Frontier Armory AR-40/10 Standard .40 S&W / 10mm BCG (Glock Compatible)

The New Frontier Armory AR-40 .40 S&W Bolt Carrier Group is proudly MADE IN THE USA by hard working American men and women.Features:US Made 8620 steel with black nitride finishRamped carrier to work with both 9mm and standard AR hammersPrecision milled for use with Glock style lower receiversM-16 cut for use in transferable full auto MG's, dealer post sample MG's or other legal machine guns (ALL BATFE RULES APPLY)This bolt can also be used in a large frame lower to run 10mm