||11-11-2012 12:19 AM
Depends on how specific you want to be.
A 1911 would be the model of automatic pistol that Colt began manufacturing in 1911, designed by John Browning mostly by 1909. The 1911A1 featured a few changes in mainspring housing, grip safety, thumb safety, trigger and hammer spur.
Key features would be the detatchable barrel bushing, swinging link, single action trigger, grip safety, and additional thumb safety. The entire pistol as originally designed could be disassembled using only the parts of the pistol itself.
Fast forward and things have changed. Some manufacturers have utilized external extractors, done away with barrel bushings, made full length guide rods, ambidextrous safeties, beavertail grip safeties, dovetailed sights, extended and flared mag wells, etc, etc...