The Revolution Series 1911 pistols from Sig Sauer feature all stainless steel frame and slide machined to exacting tolerances and hand fitted to insure reliability and performance. Like all Sig Sauer products the Revolution contains only premium internal parts including a match grade barrel, hammer/sear set and trigger. The frame features 25-line per inch checkering on the front strap and 20-line per inch on the mainspring housing and is complimented by a set of checkered grips. Both the frame and slide on the Revolution are de-horned making it ideal for perfect full size concealed carry. For safety the GSR features a beavertail grip safety with speed bump, extended thumb safety, firing pin safety and hammer intercept notch. Also available in compact size with a 4 1/4" barrel.