Ar308 Low Mass Bolt Carrier Group Nickel Boron - Ar 308 Low Mass Bcg Nickel Boron

The 8620 hardened low-mass steel carrier is smooth. This assembly includes a properly staked gas key for a lifetime of service in your next custom build. NB (Nickel Boron) plated for easy clean up and corrosion protection Bolt material is aerospace grade 9310 MPI inspected Machined ejector and S7 extractor will easily handle the pressure of hot, .308 based calibers Properly staked gas key for a lifetime of reliable service Drop in fit for any quality .308 case head based, DPMS-compatible AR rifle with forward assist Perfect for .308/7.62X51, .243, 6.5 Creedmoor, .260, .338 and other .308 Winchester based calibers Low mass carrier can be tuned with your gas system for lower recoil impulse ;