The Ruger GP100 is the strongest production double-action revolver available — a full-size .357 Magnum six-shooter built on a solid steel frame engineered to handle a lifetime of full-power magnum loads without the endframe wear that affects other designs. The GP100’s triple-locking cylinder, transfer-bar safety, and Ruger’s coil spring action (rather than leaf springs) produce a revolver that is more durable and requires less maintenance than most competitors at any price point.