Should I G19 --> M&P ?

[blackscot]

Less blocky, more oval cross section too.

[S-1]

S-1 - Where they the 10 round mags? I have a couple 10 rounders for range beaters and when I load them up I can feel the whole bottom piece moving around. I can see how they might break under hard use.

Nope. They were standard capacity mags.