The file 'WE M4A1 Magazine Unloader 3D Printer Model' is (stl) file type, size is 139.1KB.
BB unloader for We M4a1 gbbr
You need 4mm thick pin or wire for assembly
you can download fiels herehttps://cults3d.com/en/3d-model/tool/we-m4a1-magazine-unloader