The PM-63 RAK (short for Ręczny Automat Komandosów — "commandos' hand-held automatic"; the abbreviation itself means crayfish in Polish) is a Polish 9mm submachine gun, designed by Piotr Wilniewczyc in cooperation with Tadeusz Bednarski, Grzegorz Czubak and Marian Wakalski.
The PP-19 Bizon ("Bison") is a 9mm submachine gun developed in the early 1990s at Izhmash by a team of engineers headed by Victor Kalashnikov (son of famed AK-47 designer Mikhail Kalashnikov).