I once made a basic shotgun with a few sections of high pressure piping ,a cheap welder, and a 2x4.

Also once made a 9mm semi-auto pistol, complete with riflrd barrel and lock mag compatibility. 3d printer, more pipes, and some electroplating equipment.

It's not particularly difficult to make a shitty slam fire hardware store shotgun that only has to work a couple times.

I'm a big fan of minorities arming themselves and training. It's pathetic how little you need to rain to get more experience than cops. Don't be worse with guns than a cop.