On Colt's website, it lists two magazine models for sale, part numbers SP579991 and SP572491, respectively. They look identical and are both described as "Magazine Assembly, 7 Rd, Stainless, 45 ACP." Which one do I get for a new Series 80 M1991? Pics below: SP579991 SP572491 Link to Colt's website: http://www.coltsmfg.com/ShopOnline/tabid/62/orderby/name/CatID/11/currentpage/2/Default.aspx Thanks for any info guys! Wanna kill these ads? We can help!