OK, I know it is not allowed in Germany, and it is definiately NOT PTB gun, but it is legal "freie waffe" in Hungary since september 2004.
The thing is a prototype of a 9 mm PAK Ingram-style "maschinenpistole" with 20 rd magazine.
Full auto, simple blowback, entirely made of steel, otherwise it should melt down:-))
Shooting with the thing is pure fun.
The retail price will be about 300 euros here.
Just for curiosity....