
you on fraud watch. the AR-15 was invented in 1956 as a sized down AR-10, and then was dubbed as the M16 in 1962 when the US Army decided to adopt it as their rifle after Colt bought the patents. the AR-15 is the OG and the basis for the US Military's rifles since Nam. I've used an actual M4 and built my own AR-15 from scratch along with buying a premade, I know firsthand from working on em that they're basically functionally identical, besides the Fire Control Group and associated receiver.
You wanna split hairs over "functional differences?" I'll just counter with the fact the OG AR-15 had the same full auto capabilities the M16/M4 does. It is and always was meant for military use, and virtually identical to its siblings. Shrill whataboutism with the G18 and juvenile strawmanning with the Brownings won't change that. I'm out, enjoy being a pedant nephew lmao