AB mosfets are bad for your motor. The send a electrical current that reverses your motor to stop and reset your piston to the same position everytime. Or do some other cool feature.
Tienly and shs both are good. But i recently went down to aex and they recommended the classic army extreme. I actually really like the motor, its got lots of torque and a good speed.
I'm using G&G standard gearset, 9.6, low resistance wiring, and deans.
K.W.A. ATP
an AB mosfet will definitely help with trigger response. I'm getting good trigger response with a g&g mp5, running the classic army extreme, 9.6v 1600mah, and a m110 spring. Hardly ever locks up either.. thats with tamiya connectors and a bad wiring job. the classic army extreme is $55 at AEX btw
Its not just the AB that helps your trigger response. A regular Non AB fet will also do the same thing. You can also run capacitors and it will give you a nice trigger response. The Active breaking does not give you the trigger response the mosfet does.
of course any solder-in mosfet will help trigger response. but a regular mosfet won't do all that much for trigger sensitivity.