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.

Yes....there are a few threads on it, but for the cost you might as well buy a new 9mm because you will need a 9mm frame, slide, barrel and mags.

Okay thanks. I'll let him know. On the M&P's it's pretty simple and cheap. Apparantly not so easy with a Sigma.

Will not work for the sigma.

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