The Carpenter 158 steel used in this Toolcraft Bolt is Mil-spec, and it has been shot-peened and mag particle-inspected. The gas key is staked in accordance with mil-spec, has a phosphate coating, and is chrome lined. The full-auto bolt carrier is chrome lined and phosphate treated. Produced in the USA.
Mil-Spec Carpenter No. 158® Steel Bolt
Shot Peened; Mag Particle Inspected
Chrome Lined Full-Auto Carrier
Chrome Lined Gas Key; Hardened to USGI Specifications
Secured with Grade 8 Hardened Fasteners
Staked Per Mil-Spec
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