My son makes a line of 3D printed accessories for Milwaukee pack-outs. I'm amazed at what he can design and make. They have 3 printers running full-time now.
I have one I print all kinds of things. Mostly stuff for woodworking. I’ve made adapters for almost all my tools for my dust collection system. I love it. About to be printing some masks for Halloween for the family. I’ve also made several things for shooting as well. Extended mag bases for my 10/22 mags to make mag changes easier, barrel flags, ammo holders. The sky is literally the limit.