Many of the millions of people who are new handgun owners — those first-time buyers that broke firearms sales records over the past couple years — will discover what all the not-new handgun owners already know: one handgun might not be enough. Or the handgun initially purchased was not the right one. Fortunately, the handgun market is rife with sizes and styles, and some handguns will fit their hands better than others. In any case, more new and soon-to-be new handgun owners...