Smith & Wesson K Frame Thumb Piece & Nut Blue Steel Old Style - Used - 17179E Model 39-2 Model 637 (

Model 637 (

Proper fitting and timing verification required

or returns sluggishly — directly impacting double-action reliability and follow-up shot speed

Steel guide rod for the Smith & Wesson M&P 22 Compact recoil spring

Factory-original component for proper cylinder lockup and timing

Smith & Wesson K Frame Thumb Piece & Nut Blue Steel Old Style - Used - 17179E Model 39-2 Model 637 (Smith & Wesson K Frame Thumb Piece & Nut Blue Steel, Old Style Open your cylinder with confidence using this factory original blue steel thumb piece and nut, pulled from a Model 17 . 22 LR revolver. The thumb piece is the lever you press to release the cylinder latch a high touch component that sees wear over time and is worth replacing when it becomes loose, pitted, or damaged. This old style blued assembly is a direct fit for vintage and classic K