To put things straight: If you DO put something more than 8.4v into the gun, IMMEDIATELY UPGRADE THE WIRING AND CONNECTORS! The shitty sub 16 gauge wire and the tamiya connectors aren't going to take it (not to mention the stock gearbox itself with the nylon bushings).

This being said, 8.4V is perfectly fine. I don't honestly see any point in increasing the voltage. If you want higher rate of fire, possibly invest in high speed gears/modular gear sets, or put in a lighter spring. Much less stress on your gearbox.

hey does anyone know were to get the AFTERMATH KIRENEX i had found a site for it and i went to look at it and it wasnt there anymore, so does anyone know were or if you can get them in canada???

Touche