I don't want to get into a debate regarding "intellectual property" (really I do but I know political discussions are frowned upon) I just find the notion morally reprehensible when followed to it's logical conclusion.
I think the FSR work more like darts than bullets. I'm not saying the fins don't impart some spin, just that if spin isn't imparted prior to leaving the barrel it can't favorably effect accuracy or range. I'd like to see some actual testing regarding spin rate and effect. I'm sure Tom has done the work but I haven't found his results.