My brother just acquired a brand-spankin' new S&W 4040PD, which appears to be S&W's first attempt to make an autoloader using Scandium. They come with 7-rd mags stock (it's single-stack), and I can't find any info on whether or not S&W or anyone else makes any larger mags / mag extensions, or if the 4040PD will work with mags from any other models. Anyone here know any more about this? I'd like to get him some larger cap mags and I'm also interested in buying one (the pistol, that is) for myself as well, and I'll definitely want more than 7+1.