Mil-Spec Dimensions For Drop-In Fit; MPI Inspected For Soundness
Complete bolt/carrier assembly comes ready to drop in your rifle—ideal as a replacement, in a custom build, or as a backup for extra insurance during competition. Machined from high-grade 8620 carbon steel to mil-spec dimensions, with hard-chrome plated steel firing pin and chrome-lined, staked gas key for added durability. Carrier is notched for forward assist. Magnetic particle inspection (MPI) during manufacture ensures each component is solid and free of internal flaws. Parkerized mil-spec finish.
AR-15, Issue:11, Page:012
Big Book Catalog, Issue:72, Page:017
8620 steel. Parkerized mil-spec finish.