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. Rock Island 51912 Baby Rock GI Standard CS 380 ACP Caliber with 3.75" Barrel, 7+1 Capacity, Overall Black Parkerized Finish Steel, Beavertail Frame, Serrated Slide & Black Rubber Grip