u/Cosm1cSyrup

One of my players wants to make a makeshift gun with a pipe, gunpowder and fire magic, and i'm trying to figure out logistics of that in initiative, like would reloading it be an action? And would he be allowed to? Im so unsure.

Im trying my best to say no the least amount of times possible (obv if it goes against rules i have to say no) but I'm unsure.

Edit:

He is looking at artificer, and for the character he wants to make it makes sense, however i am trying to make it make sense in terms of the world, also there are no guns in my homebrew world. Another difficulty i have, is i want to do dismemberment, and obviously i can't just make it 1 tap on a headshot

Context: Our party is fairly new to the campaign we're in (5 sessions in) and new to dnd all together, our DM has played before as a PC, but hes a first time DM.

Pretty much EVERY time we've met an NPC this run, he's put them at a level way higher than us, or has given them abilities that are way stronger than us. Like i get that its a good incentive not to fight them, but when he ends up saying stuff like "if you do that, he can fireball and 1 shot all of you" when we just hit level 4 last session.

Like in the first area of the map we were in, we bumped into a pretty egotistical dragonborn, like he physically bumped into me, and as a cocky, confident dragonborn myself, i got confrontational, until "ding ding DM notification, you might not wanna fight this guy, he's level 9 (im level 3 atp).

Its just getting kinda annoying at this point, and i didnt know whether to put this in AITA or here, but here it is.