Does anyone make high-capacity S&W Shield magazines? Something like a 12 or 14 round mag? I'm thinking it'd be useful as a spare mag; if you expend your 7 or 8 rounds in the standard magazine, you're probably wanting a lot more ammo! It could even have the grip extension like the 8rd mags have, though that could get bulky.
Note: I do not have a Shield, I'm just looking at one potentially (probably in the very distant future).
Note: I do not have a Shield, I'm just looking at one potentially (probably in the very distant future).