PP-19 Bizon with a F2 engine dropped inside, rifle was featured on polarstar official sites check them out! Bizon rifle is only 2 months old and the F2 engine roughly a month. Come with a 1000 round magazine (I fixed the common feeding issue they are prone too have!). Current set around 92 psi for reaching yards of 150 plus (short barrel) Just want to sell it to fund a new project. !!!Price is negotiable if picking up locally!!!