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
![[TW Nerf] 6.04mm Stainless Steel Precision Inner Barrel[372mm][For Systema M4 PTW Series]](http://www.sixmm.com/cdn/shop/products/11439__TW_Nerf__6.04mm_Stainless_Steel_Precision_Inner_Barrel_260mm_For_Systema_M4_PTW_Series_1.jpg?v=1610430790&width=950)
![[TW Nerf] 6.04mm Stainless Steel Precision Inner Barrel[372mm][For Systema M4 PTW Series]](http://www.sixmm.com/cdn/shop/products/11439__TW_Nerf__6.04mm_Stainless_Steel_Precision_Inner_Barrel_260mm_For_Systema_M4_PTW_Series__1_1.jpg?v=1610430794&width=950)