Amoeba Stryker to M4 Airsoft Mag Adapter

I've been wanting to up the capacity of my Ares Amoeba sniper rifle, but there hasn't been a good adapter available. So I decided to make my own. Modeled using measurements taken straight off of the two mags in question. This is a work in progress, will need some refining I'm sure. Uses a standard AR Magazine release to hold the M4 mag in place.

EDIT. made some aesthetic changes, lengthened the magwell for the M4 mags to allow a more secure fit. V14 is Current