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] 14mm Thread Adapter for Marui FN57 w/ Guarder FN57-10 Outer Barrel](http://www.sixmm.com/cdn/shop/products/Guarder_14mmThreadAdapterforMaruiFN57wGuarderFN57-10OuterBarrel.jpg?v=1671431138&width=950)
![[Guarder] 14mm Thread Adapter for Marui FN57 w/ Guarder FN57-10 Outer Barrel](http://www.sixmm.com/cdn/shop/products/FN57-10-07_1400x_6c9b6dcd-7f48-4b90-ae7f-f8ee8b38fa7b.webp?v=1671431138&width=950)