This gun is boss. Out of the box preformance was decent and reliable but lacked anything special so i overhualed the internals to ramp up the rps from a basic 16 to 25 on the same 9.6 5500 mah. Then i got a 12 volt and the monster was up to 37 easy. I kept the spring power low, a m115 irregular pitch. Witch gives the fps a low. But respectable 375 but im getting a new piston head and a 450mm 6.03 mad bull. Only complaint is the crappy hop up chamber.