I had to take apart as wasn’t working to find the slider had snapped along with plastic on wheel to had split , thankfully I had these from old gearbox and was able to get firing as gears are good,was going to complain but left too long before I tested
![[5KU] Magazine Base[For Tokyo Marui HI-CAPA GBB Series][BLK]](http://www.sixmm.com/cdn/shop/products/11837__5KU__Magazine_Base_For_Tokyo_Marui_HI-CAPA_GBB_Series_BLK_1.jpg?v=1610335465&width=950)