Chambered in 357 Mag the Smith Wesson Model 66 is a stainless steel K-frame revolver with a 6-round capacity and 4-inch barrel. This double-action revolver features a ball-detent lock-up full top strap and barrel serration as well as front red ramp and white outline adjustable rear sights while the synthetic grip is textured for a more positive hold. Suitable for home and personal defense in addition to recreational and competition shooting the stainless steel construction of the Model 66 resists rust and corrosion. DetailsAction SADA - Caliber .357 Magnum .38 SW Special P - Capacity 8 - Finish Stainless - Material Steel - Grips Black Synthetic - Sights Red Ramp White Outline Adjustable - Barrel Length 4.25 - Overall Length 9.6875 - Weight 36.9 oz - Return of the K-Frame .357 Magnum - Full Top Strap and Barrel Serration - Ball-Detent Lock-Up - 2-Piece Barrel - The K-Frame revolver is one of the most important innovations in Smith Wesson history and was built specifically to handle the .38 SW Special cartridge. Since its introduction in 1899 the K-Frame has been a favorite for military and police professionals as well as target shooters and enthusiasts. Todays K-Frame is available in .22 LR and .38 SW Special.