I have taken apart and fixed multiple guns and am familiar to the parts of a gearbox. However, I have never ordered and put in new parts. I have a G36CV by Umarex and S&T and am unsure of exactly what to do to it to decrease the FPS (to around 330 fps) and increase the ROF (to about 30-35 rounds per second). I would like new gears (looking at King Arms), a new motor (looking at lonex), a new piston (looking at SHS), a new piston head, cylinder head, spring guide, and air nozzle. The most difficult part is that I am trying to find all of these parts on the fewest amount of sites possible. I am also unsure of if I will need a new gearbox entirely since the stock gearbox is made for EBB, but I have disabled it. Any suggestions? Gears: http://airsoft.tiger111hk.com/Airso...igh-Torque-Helical-Gear-Set/product_info.html Motor: http://airsoft.tiger111hk.com/Airso...inite-Torque-Up-Motor-Short/product_info.html or http://shop.ehobbyasia.com/catalog/...finite-torque-up-aeg-motor-short/category/44/ Piston: http://shop.ehobbyasia.com/upgrade-...g/pistons/shs-full-steel-15-teeth-piston.html Air nozzle: http://airsoft.tiger111hk.com/Airso...p-Air-Nozzle-For-G36-Series/product_info.html Cylinder head: http://shop.ehobbyasia.com/upgrade-...inder-head-for-g36-aeg-short-type-nozzle.html Piston head: http://shop.ehobbyasia.com/upgrade-...ate-ventilation-piston-head-with-bearing.html Spring guide: http://shop.ehobbyasia.com/upgrade-...uides/shs-spring-guide-for-version-3-aeg.html Battery: unsure... LiPo perhaps... http://shop.ehobbyasia.com/bb-batte...v-3000mah-15c-lithium-battery-crane-type.html or http://shop.ehobbyasia.com/bb-batte...ng-arms-7-4v-2500mah-20c-lithium-battery.html I could run the batteries to a PEQ box or my stock, but don't know which PEQ boxes they would fit in. Thanks for your time and input. I have used both of these sites before and know that they are reliable.