NPAS system or pressure regulation system.
Allows you to adjust the output power of your replica (FPS / JOULE).
It also increases consistency shot-to-shot.
NPAS allows you to manually adjust the flow regulation of GAS.
For KSC / KWA MP7/MP9 series & similar, KSC KTR-003 & KSC M4 version 2 & KWA LM4 GBB.
N.B. Although it varies by model, the general rule allows you to adjust the GBB weapon both above and below the factory settings.
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