Indeed. Desperate times call for desperate measures.
These are some examples of homemade firearms that were used by rebel forces in the Chechnya Wars. Some of these SMG's actually look quite rugged and well built. Open bolt automatics from stamped steel are even simpler in design and metallurgy than a matchlock musket.
Submachine guns and machine pistols.
"Boom tube". (Grenade/mortar launcher)
Franken-Kalashnikov cyborged from various parts. (Probably from salvaged parts from the damaged guns belonging to Russian soldiers killed by IED blasts)
Guerrilla fighter with homemade SMG and captured Russian tank helmet.
If I was a gun banning totalitarian piece of shit, I'd take one look at these pictures and chill the fuck out, if only just to preserve my own life...