1sailor
Member
I own an M&P40. A little while ago I picked up a 9mm barrel for it and a couple of magazines and usually fire 9mm when I'm shooting targets. I was telling a friend at work about it and he was wondering if he could do the same thing with his sigma. I told him I didn't think so but that I would ask online just to see. Before anyone panics let me say that this is a very common conversion with the M&P's with many owners having fired many thousands of rounds this way.
