I'm not mentioning the actual gun part because what matters is the ammo. Also, pretty PLEASE, do not mention 80% lowers here, it is a royal american privilege derived from the fact that critical SPECIFIC gun parts are unregulated. It's useless against global gun control.
We all know about FGC-9, Urutau, hybrid designs, machining, it's not really a problem and just takes time to get a gun. What matters is the ammo.
>just 3d print it dumbass!
WRONG.
While yes, there is PIP (print in place) 9mm, but:
1) its insanely weak, only good enough for plinking, the bullet is fucking PLASTIC
2) you need a factory primer
3) it does feed reliably but meh, if you put actual gunpowder there it's gonna end up badly