Milspec Carpenter No. 158® steel bolt
Shot Peened Bolt
High pressure tested (HPT)
Mag particle inspected (MPI)
Chrome Lined Carrier (AUTO)
Chrome Lined Gas Key
Gas Key Hardened to USGI Specifications
Gas Key Grade 8 Hardened Fasteners
Gas Key Staked Per Mil-Spec
Tool Steel Extractor
Extractor Spring
Extractor O-ring Insert