My project gun which I'll be starting on probably this coming month of june is going to be a C8. Right now I'm in the planning stages, and so far the plan calls for a 9.6v butterfly battery. I realize the extra voltage from such a battery will give the gun some extra "snap" and in turn will increase strain on the internal parts such as gears and bushings.

The solution of course is to get reinforced metal gears and bushings. I've been looking at some of the retailer sites, and notice that in the long run, I can save some cash buy purchasing an internal upgrade "kit" that in addition to new gears and bushings, include enhanced springs and the such. This seems like an ideal solution, but the base upgrade makes the jump up to 350fps. Obviously, I don't see the need to go any higher than 350 myself, but I realize a stock m4, the basis of my gun, is only a 275fps weapon. 75fps isn't an insignificant increase in speed.

The short question is: Whats the Max FPS allowable at XT?