Mosfet questions

hey guys im looking into a mofest for my g36 but have a question about them i know they stabilize the voltage but what im wondering is what a good mofset or does it matter i have been looking at this one:
http://extreme-fire.com/SW-PANTHER.html
but im not sure what i should be looking for any suggestions? thanks

wait, what exactly does it do?

ha thats what im asking lol i just know if keeps the voltage at a constant rate ha
read this
http://www.airsoftmechanics.com/home/content/view/16/30/

i found a youtube post its not all that great but check it out
https://www.youtube.com/watch?v=ZF3FrZ5Yw6A&feature=related

review on the mosfet i was looking at

https://www.youtube.com/watch?v=ehnHmj-xaXw

I haven't played around with mosfets at all really. That whole concept is a little fuzzy to me.

ha yeah me too i have found some good reviews on them but all i really know is that it evenly distributes the voltage load on the wire system so the motor doesnt break.

Considering that motors are pretty inexpensive I don't think the Mosfet stuff is worth it.