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
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![[GHK] GHK MK4 10" Handguard [OD]](http://www.sixmm.com/cdn/shop/files/2_71ca4510-1d95-4ac4-9369-5914dfb4183a.jpg?v=1709862163&width=950)
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![[GHK] Daniel Defense CNC M4A1 RIS II Aluminium Rail Handguard[12.5inch][FDE]](http://www.sixmm.com/cdn/shop/products/GHK_DanielDefenseCNCM4A1RISIIAluminiumRailHandguard_12_4.jpg?v=1620735423&width=950)