Smith and Wesson - M&P 9mm 10/17 Round Magazine
Magazine for Smith & Wesson M&P 9mm pistols. Constructed from heat-treated blued-steel, with a follower, lock-plate, and base-plate molded from a proprietary DuPont® Zytel™ based black polymer; and using a spring wound from Chrome-silicon wire and heat-treated for strength and reliability.
High capacity magazines are limited to 10 rounds.
well made no problems work great
OEM 17 round capacity magazine with a rivet block for the 10 round Canadian compliance. The 10 round magazine that comes stock with the M&P 9 has a very tight spring and you can barely fit the tenth round in, even with a speed loader. These magazines 10/17 — are SO much better.