Assault weapon is a political term.  

See, even the FBI doesn't have an "assault weapon" category: https://ucr.fbi.gov/crime-in-the-u.s/2016/crime-in-the-u.s.-2016/tables/expanded-homicide-data-table-4.xls

Josh Sugarman, a notorious anti gun zealot coined the term assault weapon with intent to dupe, confuse and manipulate the anti 2A crowd:  http://www.quotes.net/quote/17826

Much has been noted of the Mini 14; a semi auto rifle that has been around for about 45 years.  Traditionally, it was sold with a wooden stock and a 5 round magazine.  It looks like a hunting rifle.  Numerous companies make aftermarket stocks, magazines and other accessories and it's been noted by adding a folding stock, larger magazine, flash hider it is suddenly an "assault weapon"  Such nonsense.

Assault: Verb, an action. To attack someone.
Weapon: Object used to cause physical harm.

If you need to insult, that means you are losing the argument and talk about civil conversation....