Built to true Series 70 design, Rock Island Armory has the most well-built and versatile 1911s available today at a price point that is not achieved by any other manufacturer. Each firearm is built using 4140 Ordnance steel and engineered using the latest CNC machines. All 1911s are hand-fitted and confirmed to meet strict tolerance and quality requirements in tightness, smoothness and overall look and feel. No matter which series you choose, you'll get the same level of detail regardless of caliber, size, or format to meet the needs of every 1911 enthusiast.