Colt Verified Proof V&P In triangle marking on remaining facet from the barrel concerning the legs of the entrance sight foundation: Personally, I wouldn't use a drill press. It may be completed, but I'd go the router or mini mill route. Carry on AT Your individual Hazard. The creator of https://directoryrec.com/listings504763/the-fact-about-colt-combat-unit-rail-gun-45-that-no-one-is-suggesting