The Rock Island Armory 1911 series is a product line of single-action recoil operated semi-automatic pistols. They are designed and manufactured by Armscor in Marikina, Philippines, and distributed in the United States by Armscor USA, located in Pahrump, Nevada.

RIA (Rock Island Armory) 1911s are derivative of the US Military G.I. M1911-A1, the standard issue US Service pistol from 1911 to 1985. Most RIA models are targeted at the low-end price point of the 1911 pistol market and are basic entry level MIL-SPEC versions of 1911, however, the RIA Tactical, Compact, and Match models offer additional higher-end features. The Compact model features a skeletonized hammer and beavertail grip safety while the Tactical model also adds a target-grade hammer and trigger as well as an ambidextrous safety, and enhanced contrast combat sights. Armscor is an ISO 9001 certified-compliant company which manufactures Rock Island pistols using CNC (Computer Numerical Control) equipment. RIA 1911 series pistols are constructed of 4140 chromoly steel with a cast frame, and are available in .45 ACP, 10mm Auto, .40 S&W, .38 Super, 9mm Luger, and .22 TCM chamberings.