[grimreefer]

I'm looking to put my M4 between 420-450 fps, semi-only. I'm going for a lot of effective range.

Here's what I have so far:

-Stock gears (TM)
-ICS Turbo 3000 motor
-Modify S110 spring
-Modify spring guide, piston, piston head, cylinder, cylinder head, air seal nozzle
-Unknown inner barrel
-KA hopup with Guarder black rubber

Here's what I want:

-Guarder Infinite torque motor
-Modify S120 spring
-Prometheus inner barrel

Questions:

-Do I need a steel gear set? If so which one?
-Is there a hop rubber that would be more appropriate for the new setup?
-Would the TriggerMaster Mosfet be beneficial at all?