TRYBE Defense LR-308 DPMS .308 Complete Bolt Carrier Group BCG. Fully assembled Mil-Spec BCG designed for DPMS LR-308 pattern uppers. Caliber compatibility includes 7.62x51mm NATO and .308 Winchester based LR-308/DPMS patterns. Includes bolt, bolt carrier, gas key, firing pin, cam pin, and firing pin retaining pin. Bolt and carrier are constructed from AISI 9310 and AISI 8620 steel, respectively. Nitride-treated bolt carrier and Nitride Black finish option or Nickel Boron coated version available. Headspaces properly with LR-308/DPMS pattern barrels for reliable function. Weight: 18 oz. Fits DPMS LR-308 pattern uppers. MIL-SPEC quality control with HPT and MPI testing.