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Lower than expected FPS: King Arms M4
Hey I recently upgraded my KA M4 with these parts:
Modify Enhanced Cylinder (300mm-450mm)
Modify Air Seal Nozzle - M4/M16A2
ARS Hayabusa Bearing Spring Guide - V2
MASK Aluminum Piston Head with Bearing
Modify S110 AEG Upgrade Spring
To my surprise I'm only getting 350fps with a .20g bb which is lower than the 410-ish fps I was hoping to get. Airseals are perfect and my cylinder is matched with my barrel length. I just don't understand what's causing this. Any insight as to how this could be caused would be greatly appreciated.
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Molon Labe
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