Does it really matter what the weapon itself is "labeled" or "called"? The term "assault" most likely never entered the minds of those brave men that hit the beaches of Normandy, or trapped at the seawall on Tarawa, up the hill with T.R., at Chateau-Thiery, the Navy man piloting the Landing Craft waering maybe a Victory, etc. et. al. ad infinitum..
So with above "assaults" in mind.....I suppose a 1911A1, an 03-A3, a BAR (the real one of course), a S&W Victory, a Garand, a Thompson, a Johnson.....all could be called "assault" rifles, pistols, weapons.
Heck.........I am going to look in the backyard this morning...I think I have a few "assault rocks" buried, some still NIG (New In Ground)..wonder what the collector market is before anti-rockers get around to labeling them illegal.