Smith & Wesson Model 617, Double/Single Action, Metal Frame Revolver, K-Frame, 22LR, 6 Barrel, Stainless Steel, Satin Finish, Silver, Rubber Grips, Adjustable Sights, 10 Rounds, Target Trigger 160578 Since its introduction in 1899, the K-Frame has been a favorite for military and police professionals as well as target shooters and enthusiasts. The Model 617 22 LR has a 6" barrel and 10-round capacity.