At the range today I was showing how the glock 9mm frame is smaller than the M&P 9mm frame because the glock fits in the S&W holster but the reverse is not true.
The glock mag doesn't fit in the M&P, but the M&P mag does fit in the G34... and... it won't lock in obviously but if you hold it in place it will feed! I rapid fired half a mag out of the glock with M&P mag in it.
Then of course we had to keep experimenting and if you stuff a Walther PPQ (I think) 15 round mag with a spongy sorta of rubber baseplate in and hold it in place and it feeds just fine.
So when the zombies are attacking and your buddy with an M&P 2.0 9mm or a PPQ (?) 9mm tosses you a mag you can run it in a pinch in your G17/34 sized glock.
The glock mag doesn't fit in the M&P, but the M&P mag does fit in the G34... and... it won't lock in obviously but if you hold it in place it will feed! I rapid fired half a mag out of the glock with M&P mag in it.
Then of course we had to keep experimenting and if you stuff a Walther PPQ (I think) 15 round mag with a spongy sorta of rubber baseplate in and hold it in place and it feeds just fine.
So when the zombies are attacking and your buddy with an M&P 2.0 9mm or a PPQ (?) 9mm tosses you a mag you can run it in a pinch in your G17/34 sized glock.