(Airsoft) PP-19 Bizon Silverback

My facebook page : I bought the gun on UNCompany for 320 USD, here : The PP19 Bizon is a Russian submachin gun based on the AKS-74. But unlike the assault rifle, it uses a straight blowback mechanism. It’s chambered for the 9x18 Makarov, the same cartridge used for the Makarov pistol. The gun obviously has one very unsual feature : a big 64 rounds helical feed