Try a merf 3.2 if you want rof controll and 3rnd burst or they vave another simpler one. Either one can just be pluged in between the batery and gun fora simple installation.
Chect out airsoftstore.ca the got a cpl of good fets
http://www.airsoftstore.ca/index.php...ex&cPath=35_34
They wer spose to get a small ass one too but i dont see it yet. Pico i think it was called.