Amendment II A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.
Definition armament [ˈärməmənt] NOUN (armaments) military weapons and equipment. "chemical weapons and other unconventional armaments" synonyms: arms · weapons (of war) · weaponry · firearms · guns · **ordnance **· cannon · artillery · **munitions **· instruments of war · war machines · military supplies · materiel
So is banning grenades and anti air missiles.
Guns are just personal defense tools.