HMB™ Bolt — 6mm ARC, Hard Chrome

Description

The cam pin hole passes clean through the bolt body, and it does so exactly where the bolt is asked to carry its highest load. Generations of shooters have accepted that because it is simply how the rifle was drawn in the 1950s. The HMB™ answers it with geometry rather than material science: the pass-through hole becomes a socket, and the cam pin that sits in it is radiused rather than square-shouldered.

The result is that material is retained at the cam pin location where a through-hole removes it, the contact between cam pin and firing pin is reduced, and the socket holds lubricant in a place a through-hole cannot. It is one change, in one place, aimed at the single most documented failure point on the platform — which is the whole of the Bombproof by Design™ argument in miniature.

SKU: BLT-HMB-6ARC-CHR

Full specifications, fitting notes and warnings: HMB™ Bolt — 6mm ARC, Hard Chrome — product page.

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.