SDiK SRS Silverback Pull VersionDescription Developed and manufactured by Mancraft, this drop in kit forms the basis for mounting HPA conversions for sniper rifle replicas. The conversion is CNC machined from high quality aluminum alloy and anodized red to minimize external physical damage. The kit is designed specifically to fit the SRS pull bolt series of replicas made by Silverback. Adjustable output is measured between 4 8 12 15 bar. Thanks to meticulous quality and first rate