Since you want to play dictionary, note these definitions:
*1. any instrument or device for use in attack or defense in combat, fighting, or war, as a sword, rifle, or cannon.[/I[
From WEAPON Definition & Meaning | Dictionary.com
There’s a concept in philosophy where accepting an idea or definition makes the idea or definition true or false. I can’t recall what it’s called anymore: Conditional Categorical occurs, but I find nothing on that. It will do for now, however.
The point of creating and enforcing the belief in a CC has a serious and significant purpose: it defines behavior without having to state all the sensible reasons for it. You may find this difficult to believe, but it can easily be understood. Churches are usually regarded as holy and/or contemplative locations. Therefore, people who need to think or pray go to them in order to do so. As a result, the location becomes a place of special significance which can assist a community in time of need, precisely because it has been defined so, whether more or less formality. Similarly, we hold votes on certain days simply because we decide to set Election day on particular date. It could have been any other date and would be equally correct (i.e., valid and true) provided that we did, in fact, vote on that date.
Do you see the applicability? In defining a separation of the physical object from the purposes it may be used for, we aim, if possible, to separate what we view as sensible and insensible - that is, responsible use and deliberately malicious use. The tool may be the same or different - as mentioned, there are numerous hunting and especially sport-shooting firearms whose use as a weapon is incidental and not clearly not intended - but the situation is not. The key difference in the responsible versus malicious use of firearms does not in any way lie in the use of a specific “weapon”, but the mindset of the man.
Given your hostile attitude towards guns, perhaps you could appreciate the fact that I, and many lawful firearm owners, do not consider them to be weapons. And that we would further separate I purpose firearms intended for hunting or sports, compared to those intended to be used in self-defense. The latter require a very different mental state to employ properly.