"未執d齒之前都有兩連發......
執左之後就冇....."
I haven't "open" gearbox and set the gear before, you mean just "執" the original gear then can solve 兩連發? I will try it later. Thank you your idea
回覆 #28 daiski 的帖子
what's wrong with your m4? I just use 9.6V small battery (1400 & 1700mah) and KXC BB's, no other change on the gun...
anyway, the "maintenance services" from mommy shop will help you repair it