Jaeger Precision shows how to install the Lees Precision Engineering CNC Machined Power Down Valve Set For KSC/KWA GBBs. The power down valve set is designed to reduce the power output of KSC S7 and KWA NS2 gas blow back pistols for use in CQB and other sites with limited power restrictions. It features a one-piece design with adjustable settings to accommodate different gases, temperatures, and site fps limits. Each set includes two CNC machined valves, one reducing fps by approximately 35fps and the other by 50fps. In tests, a stock KWA MP9 saw a reduction from 359fps to 324fps with the -35fps valve and 309fps with the -50fps valve. These valves are compatible with other KSC S7 and KWA NS2 models, but the reduction may vary due to different barrel lengths. The -50fps valve has also been reported to reduce the output of a KWA LM4 GBBR from 430fps to 310fps.