In order to lower the fps with an NPAS, you need to mod the nozzle (inner part). Pull the nozzle out, split it in half by removing the thin pin that's holding the two ends together. Inside you'll see a female side and a male side (male side has the tiny oring). You'll see two prongs that needs to be removed on the male side. After that, cut a notch in a cross configuration about 2mm deep. And that's it. Put everything back together and you can now lower the FPS down to 200fps. It's the same mod that's done to the WE M14 nozzle.
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