WE-Tech M4/HK416 Open Bolt mag bb pusher

Hello everyone. I recently buy lips for my WE HK416 Open Bolt, but seller say "mag pusher not included", so i desided create new, than spend money on them. Made pretty accurate, but in my complete i prefer some sanding, just to delete some sharp and jamming edges. Also added 1 variant of my desing, maybe its work better (i dont test).