A recent case from Sweden:
“Already 20 years ago, Raimo Huolman, 55, was singled out as “the mafia’s gunsmith”. – I am like Bofors, he said then. Now he has – once again – been sentenced to four and a half years in prison for, among other things, extremely serious weapons offences. At home in the kitchen, he 3D-printed automatic weapons and revolvers to be sold to the Foxtrot network, according to prosecutors.”
Several identical firearms have been seized in recent months and appear to be mostly 3D printed double-action pepper box type revolvers using a Webley-Fosbery type tracked cylinder arrangement. The cylinders (thankfully for anyone who shoots one) appear to be sleeved with lengths of steel tube and chamber .22 rimfire.
‘HEXAGUN 22, D.A (Double action?) Pepperbox’