pp-19 bizon
The PP-19 Bizon (ПП-19 «Бизон»)is a Russian submachine gun designed in the early 1990s by Victor Kalashnikov (son of Mikhail Kalashnikov). The design is based on the AKS-74, while sharing 60% parts commonality with it despite being blowback instead of gas-operated. It uses a high-capacity (64 9×18mm Makarov rounds) cylindrical helical magazine similar to earlier Calico M950 design, but placed as a foregrip.