However, SalesForce is banning the sales of guns based on their aesthetics, and describing the guns that they're banning as "assault-style" is accurate. How else would you phrase it?
However, when people do, it doesn't make sense to quibble with the terminology used when that terminology is actually accurate.
There are "battle rifles" and included under this umbrella is the M1 Garand, which is a larger caliber. The US Military realized that they needed a weapon that only shot out to 100-400(ish) meters rather than 700-900 meters, which was needed for WW1 & WW2. The "assault rifle" came about and actually refers to the ammunition rather than the weapon. The "assault" caliber is meant to take a person out of the fight rather than kill them.