Since the SenateJudiciary Committee passed Sen. Dianne Feinsteinâs âassault weaponsâ ban March 14, a fitting question might be, what is an âassault weaponâ? A term that originated in the 1980s, it was popularized after the original âassault weaponsâ ban in 1994. âAssault weaponâ is now the popularly accepted term for the AR-15 and many other rifles and pistols that would be more accurately described as âdefense weapons.â