what other s&w models magazines fit the 908,3914,3913.. if there are any.. thanks

The 3904 and 3906 9 round mags fit but stick out the bottom a little.

3953 & 3954 also use the same mags.

I have a few that fit my 3914 and my 3953, but oddly, one of the flush fits is a seven shot, not an eight. I thought that was strange, especially since they fit the same space. Still works, though.