New release mechanism for magazine

So here's a cutaway view of my latest grip model.  There's a nice amount of material so that the magazine will not bind inside of the grip.  The magazine now has a bar with a notch in it that will hopefully catch on the to-be-designed release button.  I haven't decided how to approach the spring loading for the magazine, but it will come to me once I have the release mechanism designed.

I'm starting to think that I am going to have to go all-SMD for the PCB because there really isn't a lot of room in there!