Mobile mass piston application
The application of the piston proved to be very simple - assembly - along with the piston end. One drop of chemical lock and everything was perfect. Although the concept allows adding extra weight...the piston with a silent head is already 20 grams heavier. With an M170 spring that is generating 530fps (hop up calibrated to BB .48) and extremely silent. The shipping work and order information made by Powair6 has been impeccable to say the least.