Rock Island Armory 51679: Action: Single Action - Caliber: 9mm - Capacity: 17 - Finish: Parkerized - Grips: G10 - Front Sight: Orange Fiber-Optic - Rear: Elevation & Windage / Adj. White Do - Barrel Length: 5 - Overall Length: 8.75 - Weight: 3 lb. - The 2011 High Capacity Tactical model is outfitted to hold up to 17 9mm rounds in its magazine at one time. The firearm is equipped with front and back wide-angled slide serrations and a tactical rail. - The new 2011 series comes in two configurations the single-stack model which comes in a .45 caliber barrel and the high-capacity model which comes in .45 or 9mm. Both have a full dust cover rail to even the weight and reduce recoil. Upgrades included are ambidextrous safety combat hammer and extended beavertail for maximum comfort and safety.