This video from Laylax showing the disassembly procedure of the new Tokyo Marui Type 89 Gas Blowback Rifle should be helpful to owners of the GBB... "Tokyo Marui Gas Blowback 89 Equation 5.56 mm It is an introduction example of decomposition procedure of rifle <fixed headstock type> (nearly complete disassembly). The body here is using unused new ones after opening. The part name being disassembled is based on the parts list of the product. I intended to make it as difficult as possible to lose parts. I would be pleased if it will be helpful for maintenance, repair, custom etc. Assembling procedure example of our products conforming to here Video is here! Beginners can do it."