PPS Steel VSR-10 Cylinder. A low cost, high quality alternative for those wanting peak performance out of their VSR-10 based sniper rifles. For those of you that don't mind pulling back 600 or 700+ FPS springs, this cylinder can handle all the spring tension you can throw at it. It is machined out of carbon steel for the ultimate in performance and quality control. It will accept standard, upgraded cylinder heads, sorbothane dampeners, and all the upgrade parts to make your rifle into a 100+ yard monster.