GUNSMITHING SERVICES: 8-40 base hole receiver threading Type:Stand Alone Thank you all for participating

Thank you all for participating

Fully Adjustable

This service is offered in two ways

*Notes regarding receivers and bolts:

GUNSMITHING SERVICES: 8-40 base hole receiver threading Type:Stand Alone Thank you all for participatingAn unfortunate side effect of production grade receivers is the tendency for certain features to be machined slightly out of position. Our 8 40 optic base hole upgrade is intended to resolve this issue, additionally, it can also add base holes to receivers that were not originally machined for them. (1903 Spgfld, Mauser, etc) By aligning the receiver bore parallel to the machine's work environment, we can correct positional errors on existing holes