I know that when I went through the NRA instructor course for the Boy Scouts, it was pounded in our heads that "weapons" were not permitted, but firearms, guns, and rifle was okay.
I try to stick with either of those and avoid the word weapon.
NRA Life Member
Me: "The .45 GAP was an answer to the question nobody asked."
Trooper pal: "Says the guy who thinks .38 Super and 10mm are viable pistol calibers and gets mad when Wal-Mart doesn't have them."