Smith & Wesson N Frame Model 625 Mainspring & Strain Screw
Part Number: N424
Condition: Used - Excellent
Frame: N Frame
Model: 625 (Jerry Miculek Performance Center Version)
Caliber: .45 ACP
Finish: Black
Weight: 1 oz
Product Details
Genuine Smith & Wesson factory mainspring and strain screw assembly for the N Frame Model 625 revolver in .45 ACP. This is the Jerry Miculek Performance Center version, designed for competitive shooting and optimized trigger performance. The mainspring controls hammer tension and directly affects trigger pull weight and smoothness.
Jerry Miculek Performance Center Version
This mainspring comes from a Jerry Miculek edition Model 625, which features factory-tuned action components for competitive revolver shooting. Jerry Miculek is a legendary competitive shooter and multiple-time world champion known for his incredible speed and accuracy with revolvers. Performance Center versions of S&W revolvers feature hand-selected parts and precision tuning.
Function & Compatibility
The mainspring (also called the hammer spring) provides the force that drives the hammer forward to strike the firing pin. The strain screw allows for adjustment of mainspring tension, enabling you to fine-tune trigger pull weight. This assembly is specifically designed for Smith & Wesson N Frame Model 625 revolvers chambered in .45 ACP.
About the Model 625
The Smith & Wesson Model 625 is a large-frame N Frame revolver chambered in .45 ACP, using moon clips for rapid reloading. It's extremely popular in competitive shooting, particularly USPSA and ICORE revolver divisions. The Model 625 is known for exceptional accuracy, smooth double-action trigger, and the ability to use readily available .45 ACP ammunition.
How to Identify Your S&W Model
To determine your Smith & Wesson revolver model number, swing out the cylinder and check behind the yoke on the frame for the model number stamped into the metal. Model numbers began in 1957-58. If no model number is present, your revolver may be pre-1957. Contact us with your serial number for assistance in identifying the correct parts.
Installation & Specifications
- Professional gunsmith installation strongly recommended
- Requires disassembly of grip frame and internal components
- Strain screw adjustment affects trigger pull weight
- Factory OEM part manufactured to exact S&W specifications
- Used part from functioning Performance Center revolver
- Compatible with N Frame Model 625 .45 ACP revolvers
- May require fitting by qualified gunsmith for optimal performance
Performance Notes
The mainspring tension directly affects your revolver's trigger pull. A lighter mainspring reduces trigger pull weight but may cause light primer strikes with hard primers. The strain screw allows fine-tuning to achieve the perfect balance between reliable ignition and smooth trigger action. Performance Center parts are hand-selected for consistency.
Contact Us
We specialize in Smith & Wesson pistol and revolver parts - used, new old stock, refurbished, and new. Our team has extensive knowledge of S&W firearms, including Performance Center models, and can help you find the exact parts you need.
Questions? Email sales@usagunsandgear.com or call 770-544-8075