Works really well with Jing Gong/Golden Eagle M4 series.
Only thing you've to tweak is the in-tube spring... the spring finishing is somehow rough so you've to trim down the ends of the spring to help it's rotation inside the flute (or use some washers small enough if you can find some) allowing smoother turning of the valve.
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NPAS (Negative Pressure Adjuster System) is a way to regulate the
"depth" of the valve. Thus it is possible to adjust the muzzle velocity
of the bb. It is done from the nozzle by using a key that is included.
This solution much easier to adjust then original regulation.
Power of all presented replicas is less than 2 [J]. You cannot buy a replica in our shop if you are under 18. Do not shoot at other persons, birds or animals.