Novritsch SSG10 Hopup ChamberThe hop up can be easily adjusted from the outside of the gun which makes it very convenient during the game. The CNC cut hop up arm is made of steel. Secondary machining ensures a perfect fit. Unlike in a standard VSR 10, the stainless steel adjustment pin has a machined slot on both sides of the chamber for perfect alignment and to go against the typical VSR 10 right curve issue. Additionally, the chamber features 20 adjustment positions optimized