Frame mag release vs bottom thumb release
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Just make sure which ever you wide up choosing, it as a side-frame, mag release, as opposed the the bottom, thumb-mag release.
The side release pops out the mags fast and straight, same for going back in, whereas, the bottom thumb-release mags do no pop out, you have to pull them out, and insert them slightly off center first before they will go straight up and in.
Worst part of the thumb-mag release is if you have a jam and need to cycle the slide to clear out the jammed bullet, it will take some faience to get the thumb-release pushed, and at the same time, pulling hard to get the mag to come down just a tad, in order for you to cycle the slide.
Ls