Laylax does a step by step disassembly and assembly of the new Tokyo Marui USP Gas Blowback Pistol... "This is an example of the procedure to complete disassemble the Tokyo Marui Gas Blowback USP (full size). The part name being disassembled is based on the parts list of the product. In the process of disassembly, I think whether it is a procedure that makes it hard to lose the springs and parts. Please make reference for maintenance and repair."