Actually, those are the newer standard barrel lengthed OSS Models, if the Taurus Website is to be believed. The 5 inch barreled models are Long Slides. According to my OSS's manual, anyways. I expect that the largely single action 24/7 Pro line will be phased out in favor of the OSS models. While I like my new .45 24/7 OSS, I am not sorry I bought my 9mm 24/7 Pro with the Standard Barrel Length. Perhaps the prices will come down some when the newer OSS models become more prevalent, but with the continuing slide of the US Dollar, I wouldn't count on it!