S&W K Frame Model 66 .357 Magnum Thumb Piece & Nut Assembly Stainless Steel 66177 CS40 Series Gunsmith installation recommended for proper

Gunsmith installation recommended for proper fit

or having a backup slide for quick configuration changes

Factory OEM Smith & Wesson K Frame Rimfire Hammer Assembly

5" tall x 15" wide - highly visible

Part# J139A | Used OEM Factory Parts |

S&W K Frame Model 66 .357 Magnum Thumb Piece & Nut Assembly Stainless Steel 66177 CS40 Series Gunsmith installation recommended for properSmith & Wesson K Frame Model 66 . 357 Magnum Thumb Piece & Nut Assembly OEM Part Number: 66177 Condition: Used OEM Finish: Stainless Steel Configuration: Old Style Compatible Models This thumb piece and nut assembly is designed for Smith & Wesson K Frame Model 66 . 357 Magnum revolvers. The K Frame platform is centerfire and compatible across all centerfire K Frame models (10, 11, 12, 13, 14, 15, 16, 19, 53, 64, 65, 66, 67). This old style