New frontier bolt carrier ar40 40s&w/10mm auto black
FEATURES:
-US Made 8620 steel w/ mag phosphate finish
-Ramped carrier to work w/ both 9mm & standard AR hammers
-Precision milled for use w/ Glock style lower receivers
-M-16 cut for use in transferable full auto MG's, dealer post sample MG's or other legal machine guns
-This bolt can also be used in a large frame lower to run 10mm
