Airsoft scar H magazine floor plate for vfc mid caps (screw attachment)

A friend of mine broke several original ones. Original features a hook and bumped piece to remain in place and hold internals. Hook snaps easily and then nothing holds internals. So I made a new floor plate wich is held in by a screw. Magazine has a provision for m3 nut.
So to assemble you need this, m3 nut, m3 screw with thread leingth no more than 13.5mm
*Uploaded cad file by request.