Black Ops Manufacture Black Ops EU Valve without Drilling HPA for GBB WE / KJ / VFC

Valve without drilling allowing you to transform your gas charger into HPA without modifications. Aluminum 2017 Tool-free assembly   Compatibility: WE range VFC range KJ Works range Glock VFC Umarex / Cybergun gas range Warning: for a good assembly, add a turn of Teflon tape around the screw thread and  screw the valve by hand  only (do not use any tool)