GBB Upgrade Part
A CNC'd stainless steel device that lets you adjust the FPS of your WE open bolt rifle.
A perfect addition to your WE GBBR if you need to adjust your velocity depending on which site you're playing at. Simply fit the NPAS, adjust the allen head screw with the provided tool and you're done. Constructed from stainless steel so you don't need to worry about corrosion. Perfect!
It'll also help bring your rifle down to a sensible fps if you're running Co2 magazines!