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Sorry for the tardiness of my reply! This is my first factory m16/4 gearbox motorized with the tamiya crank axel three speed gearbox. Gear Ratios: 16.1:1 58.1:1 203.1:1 Motor: FA-130 is the technical details. It draws 1100ma and is tested for those ratings at 3 volts (they say 4.5 v tops) so halving the voltage from an 8.4 battery would do the trick but would double the current. Anyhow enough with that yamble! I took an allen key that fit in the winding wheel and filed it down to the slightly smaller hex axel and popped it all in! Took a bit of time to get it all mod'd, but it was worth it so i can remove everything seamlessly if need be without butchering it. I have batteries in it localy but i am going to wire it to the trigger in a few days and test to see what the motor needs to do to keep up to my m4a1. It has prometheus bearing bushings, systema bearing spring guide, and an ms100. So time will tell what the rof is on it with my 8.4v 1200mah battery. I am running it at 203.1:1 ratio and it has no problems what so ever winding the mag. If you can get ahold of another tamiya gearbox of the same size go for something with a little less torque (say 50-100:1 range) and i am sure they would do the job and keep up better to R.O.F. If need be i will get a motor that's faster and draws more ma's. The motor is common in mini 4x4 tamiya (and knockoff) cars so you can find them easily to uprade to suit your gun's feeding needs. I appologize for the long post, but there was no way around it
P.S. i did line it with felt however i am going to fully line it since some get stuck up in the intermediate chamber, but when they are fed and in to bottom chamber its silent!
:duke:
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