In this category at EXtreme Tronics Airsoft, you will find everything you need to upgrade or repair your airsoft guns. Internal parts for your airsoft gun are a main component of how your airsoft gun performs. Want to upgrade your airsoft gun for higher rate of fire, better accuracy or increase your FPS? Here you will find parts for electric guns, bolt action sniper rifles and green gas pistols. Parts including springs, air nozzles, shims, gear sets, hop up, motors, wire harness, piston heads, tappet plates, selector plates and many more may be found in this category.