BTW, a number of states have their constitution stating that weapon (disregard if a firearm) could be use for self-defense or defense of the state
Here are some examples:
"The right of the individual citizen to bear arms in defense of himself, or the state, shall not be impaired, but nothing in this section shall be construed as authorizing individuals or corporations to organize, maintain or employ an armed body of men.
" --- State Constitution of Washington
"The people shall have the right to bear arms for the defense of themselves, and the State, but the Military shall be kept in strict subordination to the civil power."
--- State Constitution of Oregon
"Every citizen has the right to keep and bear arms for security and defense, for lawful hunting and recreational use and for other lawful purposes." ---
State Constitution of Nevada