I've got a large pin Colt AR bought in the early 1990s. Unfortunately it has the .315" diameter pivot pins. Since then I've aquired a number of conventional size lowers and uppers with the .250" pins. I'd like the option of swapping the Colt upper onto other lowers from time to time, and other uppers to the Colt lower. I've tried the small pin upper to large pin lower offset screw on and that's not to my liking.
Fulton Armory and a few others have offest pivot pin bushings that allow the conversion of the upper. My question: If I had three of those bushings, could they be installed on both the Colt upper and lower in such position to allow a mix-and-match at will ?? i.e. render the Colt receivers a standard size for all intents and purposes ???
Thanks in advance.
Fulton Armory and a few others have offest pivot pin bushings that allow the conversion of the upper. My question: If I had three of those bushings, could they be installed on both the Colt upper and lower in such position to allow a mix-and-match at will ?? i.e. render the Colt receivers a standard size for all intents and purposes ???
Thanks in advance.