Features: 4 inches slide, thinned substantially for weight reduction Single stack aluminum Bobtail frame Exclusive Snakeskin treatment on forestrap and Bobtail housing 7-top custom cut slide with special front and rear serrations External extractor Easy to change orange HD XR front night sight Smaller, redesigned "Tactical Edge" U-notch rear sight Bull barrel Guide rod with flat wire recoil spring system Custom options included - recessed slide stop, flush barrel with recessed crown, slim grips No changes are allowed in order to maintain manufacturing efficiencies, but consistent with the "Evolution" concept, we will be varying the configurations from batch to batch, which will lead to a proliferation of different versions