Smith & Wesson K Frame Thumb Piece & Nut - Used OEM Part - Blued - .22 LR - Model 17 & 18 - 17179B .500 s&w magnum This listing is for one

This listing is for one used Smith & Wesson J Frame Model 640 Centennial hammer and trigger assembly for dash 3 and later variants

3" length specification

Economical replacement option

Part Number: M659S

Houses S-Lever mechanism

Smith & Wesson K Frame Thumb Piece & Nut - Used OEM Part - Blued - .22 LR - Model 17 & 18 - 17179B .500 s&w magnum This listing is for oneGenuine Smith & Wesson factory thumb piece and nut assembly for K Frame Model 17 and 18 revolvers chambered in . 22 Long Rifle. This used OEM part features a blued finish and is in good working condition with normal wear from previous use. Compatibility: Fits Smith & Wesson K Frame rimfire revolvers including Models 17, 18, 48, 617, 648, and K22. This internal part is interchangeable across all K Frame models (rimfire and centerfire). Finish: Blued