About this 3D model

Maybe you are like me, you bought cyma full metal ak 74 body and find yout that there is big space under hopup, and if your hopup is not screwable to mechabox you cant attach it. So when i checks the designs i made one myself, i edit it a bit after i prin it but that should be ok, the part go inside from mag hole and is pretty stiff You will need M3 nuts and bolts.