As part of its black-powder firearms designed for civilians, Colt introduced pocket revolvers, so named because they could easily fit into a coat pocket. The .31-caliber, five-shot revolver features seven-groove rifling, a case-hardened frame, brass backstrap and trigger guard. One-piece walnut grip. Blued finish. Barrel length: 4". Overall length: 9-1⁄2". Weight: 1-1⁄2 lbs.