Prometheus Hard Piston For M4/TM416/TM417 Recoil Shock AEG
These Prometheus Hard Pistons are designed for use with the TM Next Gen Recoil M4/TM416/TM417 series AEGs.
With strength far above that of the stock Tokyo Marui pistons these pistons are a must, especially when upgrading the fps on your recoil shock rifle.
In short, these pistons are rock solid.
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