Engraved Colt 45 Display Only Custom engraving on a Colt 45. Working closely with the owner, I engraved the barrel, cylinder, backstrap and hammer of this gun. We applied a French Gray finish to the engraved elements, leaving the case hardend finish on the frame. The result is beautifully complemented by the custom stag grips. Engraved Cylinder and Barrel Engraving Left Side Engraved Backstrap 123JavaScript is disabled. For customize this text use <NoJavaScript> element.