I ask this because I drew a character holding a smoking firearm. I haven't posted it yet because I want to double check to make sure this is okay to post to the Oekaki.
There is no graphic imagery, he isn't firing it at anyone, nobody is injured, but I've seen sites outright ban ANY violent imagery including weapons (due to their implications) and sites that are okay with things like knives, firearms, etc but not depictions of them being actively used.