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.
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Customer opinions:
Rated by:1average rating:5.00
Author:Marcos, Madrid
Grade:
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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All presented TOY Model BB Guns have less than 2 J of power, and are designed for adults only (18 years old and above). Shooting at people, animals and other living objects without special protection is prohibited.