The Rock Island Ultra CS HC (High Capacity) is a double-stack compact 9mm 1911 with 17+1 capacity in a 3.5-inch package. One of the most unique combinations of 1911 format with Glock-level capacity. Type: Semi-Auto Pistol Action: Single-Action Caliber: 9mm Capacity: 17 Year introduced: 2010, Philippines Weight: 31 oz Overall length: 7.25" Status: Active Intended use: Concealed Carry, Home Defense