I'm with scout26 on this one. I try to avoid the word "weapon" unless I really mean it. I know it's PC tripe, but sometimes it pays to play well with others.
Additionally, I'm of the school of thought that says it's not a weapon until intent is formed to use it as one. My kitchen knives are for slicing, chopping, or otherwise preparing food. They're not weapons. If you break into my home while I'm cooking dinner, though, my 10" chef's knife is going to become a weapon in short order. Ditto with a car, baseball bat, telephone cable, or electrical wiring: they're not weapons until somebody decides to use them as such.
My guns are the same way: they are tools for propelling one or more projectiles downrange in a consistent manner so as to deliver energy to a target. Most of them are for paper and/or clay. A few are used for hunting, and I'll grant that they are weapons when used for that purpose (though I shy away from the term; see above about "playing well with others"). My 870 with the 18" barrel and buckshot is a home defense weapon: I've already formed the intent to make that my defensive weapon in the event of a home invasion. Ditto with my sidearm (1911): even though I haven't chosen a target (haven't needed to, and, God willing, won't need to), I have formed intent to use it should the need arise. The 1911 in the cabinet, though, isn't.
Mmmmm, pedantry.