Echo1 Power up kit airsoft upgrade parts.
Stainless steel made upgrade set.
Stainless steel bearing spring guide rod and piston (light weight design).
For Echo 1 ASR (JP-54).
FPS: 480-490 with 0.20 BB.
Includes Upgrade Spring, Upgrade Piston, Upgrade Ball Bearing Spring Guide.
As always, upgrading Airsoft rifle require necessary skill & technique, consult expertise if needed.
Note: FPS measurements according to manufacturer data, actual results may vary.
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