Complete replacement bolt is configured with an oversized firing pin to eliminate misfires and hang fires that can occur in 7.62x39-chambered AR-15 rifles, particularly when using imported ammunition with hard primers. In addition, an extractor D-ring has also been installed to ensure vigorous, reliable extraction. Set includes the firing pin and the bolt with the gas rings, ejector, extractor, and D-ring installed.
AR-15, Issue:09, Page:102
Big Book Catalog, Issue:66, Page:011
Bolt-hardened carbon steel, matte black phosphate finish. Includes firing pin, and bolt head with the extractor w/ D-ring, ejector, and gas rings installed. For use in AR-15 type rifles chambered for the 7.62x39mm cartridge.