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 finish
- Ramped carrier to work with both 9mm and standard AR hammers
- Precision milled for use with 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 (ALL BATFE RULES APPLY)
- This bolt can also be used in a large frame lower to run 10mm
