I'm pro-2A all the way! Don't get it twisted.
But countless iterations of "Here's a picture of my gun" is incredibly low effort and, especially during these riots, narratively redundant.
Solution: sticky an all-day thread where people submit ONLY gun posts as top-level comments, and people can easily click "hide child comments" and vote on their favorites.
I really like your suggestion of a new domain! That way people who are really into it, can have it 7 days a week.
"Just scroll past" is what I've been doing since I joined honestly, because I'm here to be better informed. But one day a week is 15% of the time, and more than just a few posts. Mods also tend to sticky mostly gun related posts as well.
My concern is with our community (and myself) being as informed as possible, since the news is being censored in most other outlets.. and having a soft censorship on all non-gun related topics imo hurts us, even if it's only 1 day a week.