(GONE, Thanks for the interest)This is a Colt Lightweight Commander with the factory Enhancement package. Standard alloy frame, commander slide. Enhancements include machined sight rail (ala Gold Cup), recessed trigger guard (allowing for a higher grip and more grip space) Heinie Sights, upgraded hammer, extended beaver tail safety, full length stainless guide rod. It appears this Colt has not been shot much, little wear on the frame or rails, thumb safety still very tight. This Model 1911 in .45 is not "perfect" but in great condition, beautiful deep Colt bluing on slide. Lightweight with full 8 round capacity. $675 Thanks for looking. PS. That's oil not rust under the slide above the grips.