[lurkingknight]

rewiring is not so hard. what you need to figure out is how much space and where can you put a mosfet. they come in varying shapes and sizes... from replacing the trigger assembly in the gearbox to sitting in line with the battery wiring somewhere. That should help you determine what product you should get.

I run triggermaster/cheetah 2n from extreme-fire.com in my p90 and soon to be in my g36, which used to be in my m14. The extreme-fire units require you to run wires from the trigger separately to the unit and motor and 2 to the battery, so you end up having quite a bit more wire than say a aws raptor which replaces the trigger switch, which eliminates running wires from the trigger (I believe, since I've never installed one) With computerized units, once they are programmed with the settings you want, you just leave it alone, just don't leave batteries plugged in when you're storing the guns. They computerized units never turn off, since they are always monitoring the battery voltages.

I don't have any experience with the m3 so I can't help you with choosing a unit beyond telling you to have a look around inside the gun to see where you can put a unit and if it's possible to run wires to and from. I chose the cheetah based units because both the guns they are in are not standard gearboxes like a v2/v3 where the triggers are the same shape. You can't replace the trigger switch in my 2 guns with a fet unit, so I had to use an inline unit. For my g36, it's front wired v3, so all I need to do is snip and resolder a couple wires. A rear wired gun would be more difficult to run an inline since it has to hide in a buffer tube or in the stock, depending on the size of the unit it might get tricky to fit.

One of the bonus features we forgot to mention is that with a fet unit, you eliminate electrical arcing on the trigger contacts, so you'll probably never have to replace that part ever as long as you have the fet, and that's a common maintenance item in aegs.