Smith & Wesson K Pre-Model 19 Strain Screw (Square Butt)
Strain screw for Smith & Wesson K Frame Pre-Model 19 Combat Magnum 4-screw revolver with square butt grip frame.
- Part Number: 19173A
- Frame: K Frame
- Model: Pre-Model 19 Combat Magnum
- Configuration: 4-screw
- Caliber: .357 Magnum
- Grip Frame: Square butt
- Serial Number: 421519
- Style: Old style
- Condition: Used, functional
This authentic S&W strain screw secures the mainspring to the grip frame on square butt Pre-Model 19 4-screw revolvers. Professional gunsmith installation required.