Airsoft Reviews HD takes apart a CYMA Gearbox as well as tackle the problem of trigger jam in AEGs... "In this episode we disassembly a Cyma CM 046A airsoft gun and we give to you information about the trigger jam problem in many AEG's and how you can deal with it! Also we give you many detailed information of how you can disassembly a v3 gearbox and how you can clean and adjust every moving part."