In the time since Eugene Stoner first started developing the Armalite Rifle back when Chubby Checker was at the top of the charts, a whole lot has happened to the system. Not even Stoner knew that it would truly become the modular rifle of the future, rather than his later pet project specifically intended for the purpose, the Stoner 63.
Barrels got shorter, gas systems moved, silencers layered in complications, calibers changed, controls updated and swapped, belt-fed uppers constructed, heavier and lighter bolt carriers shaped, specialty bolts manufactured, extractors revised — there isn’t a single piece of the AR, from the smallest spring to the longest barrel, that hasn’t been changed, modified, and otherwise refined over time.
As a gun owner in 2017 it’s not hard to take a whole…