Complete AR-style .308 bolt and carrier assemblies are drop-in ready for replacement of worn components in existing DPMS LR-308 rifles or for a new custom build. Both components are machined from heat-treated 8620 steel, with a matte black Parkerized finish. Bolt comes fully assembled with firing pin, cam pin, firing pin retaining pin, ejector, extractor, and gas rings installed. Available alone or in a complete bolt-plus-carrier assembly; carrier comes with gas key installed and staked. Also available in chrome plated.