The Smith & Wesson Model 27 is a six-shot, double-action revolver chambered for the .357 Magnum cartridge and manufactured by the United States company Smith & Wesson. It was first produced in 1935, and many versions of it are still in production today. The Model 27 was built on S&W's carbon steel, large N-frame, had adjustable sights, and was available at various times with 3", 4", 5", 6", 6", 8", 8", or 10" barrel lengths. History When first introduced by Smith & Wesson in 1935, it was known as the Registered Magnum. The model was essentially a custom-order revolver. Barrel lengths could be had in increments from inches in length. In addition to the different lengths of barrels available, there were different grips, front sights, triggers, hammers, and finishes available. Each Registered Magnum came with a certificate of authenticity. Even though it was introduced in the middle of the Great Depression and was extremely expensive, Smith & Wesson found itself backlogged with orders for the four years that it produced the Registered Magnum. The Kansas City Police Department issued the Registered Magnum to its officers, and many other law enforcement officers across the United States carried the Registered Magnum. In 1939, Smith & Wesson stopped producing the Registered Magnum. It was replaced with the Model 27, which was available with barrel lengths of . It has been reported that these were the most popular barrel lengths for the Registered Magnum. Essentially, the Model 27 was still the Registered Magnum, but standardized for ease of production and economy. The Smith & Wesson Model 28 "Highway Patrolman" was introduced as a lower-cost version of the Model 27 in 1954, stripped of some of the features of the Model 27, such as polishing. It was noted for its durability and reliability. The 3-inch barrel length was extremely popular with FBI agents from the 1940s through the 1970s. Skeeter Skelton considered the Model 27 with a 5-inch barrel as the best all-around handgun. General George Patton carried an ivory-handled Registered Magnum with a 3-inch barrel (along with his ivory-handled Colt Peacemaker); Patton called the Model 27 his "killing gun". Variants The stainless steel Model 627 was introduced in 1989 as the "Model of 1989". It featured a -inch barrel, a 6-shot unfluted cylinder, and had a round butt with S&W Combat stocks. In 1996, the Smith & Wesson Performance Center began production of an