Smith & Wesson Centennial Smith & Wesson Centennial S&W Centennial is a family of revolvers made by Smith & Wesson on the "J-Frame". Depending upon caliber, the cylinder holds either 5 (9mm, .38 spl, .357 magnum), 6 (.32 magnum), 7 (.22 magnum), or 8 (.22 LR), cartridges. Centennials feature a fully enclosed (internal) hammer, which makes them Double Action Only (DAO) firearms. Like all other "J-frame" Smith & Wesson revolvers, they have a swing-out cylinder. Centennial models have been made in different versions like PD "Personal Defense", LS "Lady Smith", and M&P "Military & Police" The original Centennial Model 40 was introduced in 1952,
Smith & Wesson Model 27 Smith & Wesson Model 27 The Smith & Wesson Model 27 is the original .357 Magnum revolver. It was first produced in 1935, and many versions of it are still in production today. The Model 27 was built on Smith & Wesson's carbon steel, large N-frame, and was available at various times with 3", 4", 5", 6" or 8" barrel lengths and had adjustable sights. 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 quarter-inch increments from 3.5 to 8.75