These Mil-Spec bolts and bolt carriers from DPMS are machined from the correct steels, hardened to the correct hardness and phosphate coated to military specifications. The bolt does not included individual components, such as the extractor, ejector or gas rings. The carrier ships stripped, with no gas key installed. The combo includes a complete bolt carrier group assembly, with all components installed.
NOTE: Bolt assembly Requires separate purchase of Gas Rings (3), Extractor, Extractor Spring Assembly and Extractor Retaining Pin.
Sinclair, Issue:4A, Page:222