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
Big Sister: "You should be sponsored by Allen"
Me: "If you can't shoot good, at least look good walking to the firing line."
Big Sister: "Can you not afford a Pelican? Then buy an Allen gun bag."