>but he thought an AR15 was an assault rifle.
Well, doesn’t the AR stand for Assault Rifle? (Regardless of whatever the pop-culture or legal definition may be, the name itself is different; somewhat like the 1911 being named an “automatic pistol” which references the loading-action, not the firing-action.)
“Well, doesn’t the AR stand for Assault Rifle?”
Armalite Rifle, I believe. Armalite developed Eugene Stoner’s design.