Function: single shot/ continuous shooting/bilateral linkage/pull handle can be opened/breech function/pre-feed function/magazine can be multiple coupling/gearbox upgrade: metal ladder +6 bearings + metal gear upgrade motor + metal motor teeth/cylinder anti-rotation limit /XT30 interface battery
 
▲Metal parts: airway base + inner tube + handle base + left and right speed reducer + motor cover +stock connector +stock card +stock button + gear box housing fixed plate + ejection window + ejection window return shrapnel + tail top base + electric frame