KWA MP7 GBB complete disassembly and assembly

0:00 Chassis disassembly 1:42 Chassis parts disassembly 2:49 Hammer unit disassembly 5:20 Barrel disassembly 7:07 Barrel assembly 8:39 Hammer unit assembly 14:00 bolt disassembly 16:37 bolt assembly 20:43 Bolt catch&trigger lever assembly 23:43 total assembly