If you have a multi-purpose gun and you need to be able to change the FPS quickly without taking the gearbox apart, then the SAT Variable Velocity Device is the perfect option for you. This set comes with a piston that replaces the stock one in your version 2 or 3 gearbox, as well as the adjustment screwdriver with multiple extensions to ensure that it will fit with nearly any barrel length, and allows you to dramatically adjust the FPS of your gun with just a simple turn of the adjustment knob located inside the piston head.
Gearbox fitment: Ver. 2 and Ver. 3
Package includes: VVD piston/piston head, adjustment tool with extensions.
Fits both Ver. 2 and Ver. 3 gearboxes
Allows FPS to be adjusted from field to CQB levels and vice versa
Does not require disassembly of gun to adjust fps once installed
This product does require the removal of your stock piston and installation of the new one, so while it is not required, Professional Installation is recommended.
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