Smith & Wesson Model 617, Double/Single Action, Metal Frame Revolver, K-Frame, 22LR, 4 Barrel, Stainless Steel, Satin Finish, Silver, Synthetic Grips, Adjustable Sights, 10 Rounds 160584 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 4" barrel and 10-round capacity.