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
![[Guarder] AR-15 M4 Carbine AEG/GBB Dummy Gastube](http://www.sixmm.com/cdn/shop/files/1_cf3c50a0-d9da-4696-b3ae-79af5770a634.jpg?v=1685713174&width=950)