CNC Machined Power Down Valve Set For KSC/KWA GBBs

This power down valve set for the KSC S7/KWA NS2 MP9 & MP7 GBBs is designed to reduce the typically high power output down to acceptable levels for use at CQB sites and sites with limits around the 1J mark. The one piece design gives a reliable method of reducing the power output with the advantage of some adjustment to suit varying gases, temperatures and site fps limits.

Each set contains two CNC machined valves to replace the stock flute valve in the loading nozzle, one to reduce the fps by approximately 35fps and one to reduce the fps by approximately 50fps. In in-house tests a stock KWA MP9 was firing at an average of 359fps, this reduced to 324fps with the -35fps valve and 309fps with the -50fps valve.

These valves will also fit other KSC S7 and KWA NS2 gas blow backs such as the Kriss Vector, M11, M9, M93r, Mk23, USP series and G-Series but may give different reductions 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

Technical Specification

Material : 6026 T9 Aircraft grade aluminium


FPS Reduction figures are based on average test results over 25 shots against a stock KWA NS2 MP9 using 0.20g bbs and green gas at a temperature range of 21.7°C to 22.5°C, figures have been rounded to the nearest whole fps, actual FPS reduction may vary.