with a 22 tpa and the ab mosfet i still got some overspin. a complementary parts list for your viewing pleasure. lonex gear box thats had the window circularized lonex bearings seigetech concepts riot 10:1 ssg gears random selector plate retro arms cnc m4 nozzle gate merf 3.2 shs piston, aoe corrected shs aluminum piston head sorbo pad lonex compression gaurder sp120 spring vfc ball bearing spring guide lonex tappet plate jg blue 22tpa motor 16 gauge wiring with lonex gold motor connectors. shimmed white silicone grease lubed over all a great gear box with solid high speed set up. should put out right at 400 ish depending of barrel and hop up. some where between 30 and 50 rps depending on battery and motor. due to the fact that this is an internal part if you buy it there are no returns. honestly dont trust any one not to open it up and mess with it sorry. if for some reason it comes with something not in it or is destroyed in shipping please contact me and I will refund you. Open to trades dm me