Take a look at the new Systema Infinity Gearbox as it is broken apart to see what is inside in this video from ORGA Airsoft... "At the test firing event of the new Trepon internal kit SYSTEMA PTW INFINITY, he also explained the gearbox. What is the contents of the gearbox that integrates the base and motor compactly? !! Introducing the whole picture of the INFINITY gearbox, which has a simple structure despite its great evolution."