I saw an ad on an area online classifieds for 2 M&P, 9mm magazines, $10 each. Messaged the guy and he wasnt sure what they fit, but hold 8 rounds. they look like Shield magazines so I got mine out to compare to the picture. I am about 99% sure they fit a Shield, even have the little collar to fill in the grip on the extended magazines so I said I would take them. Will have to get them on Friday. They are about a half hour away. I sent Curt a text asking if he wanted one of them so we will each get another magazine.