Is the only reason why some of the M&P 40 cals have 10 round mags from the factory because of certain states that don't allow larger capacity mags? And if so, why doesn't the labeling of the pistol state that? I am in Wyoming and a local gun shop is selling the 10 round versions. We have no capacity restrictions here. I just figure if a 15 round version is available, then that should be sold everywhere except them states that don't allow it. Am I missing something or did my guns shop order the wrong version on accident? I look online and see the 10 round 40's listed but it doesn't say....."California approved" or you can plug in whatever state. Just curious. Thanks.