Outfitted with contrast sights and Ergo XT extreme use grips, the 1911 XO features SIG's durable Nitron finish designed for rugged use. The all stainless steel frame and slide of the XO are machined to exacting tolerances and hand-fitted to ensure reliability and performance. The frame features 25-line per inch checkering on the front strap. Like all SIG SAUER products the 1911 XO pistols contain only premium internal parts including a match grade barrel, hammer/sear set and trigger. For safety, the 1911 XO features a beavertail grip safety, extended thumb safety, firing pin safety and hammer intercept notch.