Smith & Wesson J Frame Model 637 Airweight Rebound Slide Assembly
Part Number: 143
Condition: Used - Good
Frame: J Frame
Model: 637 Airweight
Caliber: .38 Special
Finish: Blued Steel
Includes: Rebound slide and rebound spring
Weight: 2 oz
Product Details
Genuine Smith & Wesson factory rebound slide assembly for the J Frame Model 637 Airweight revolver. This critical action component includes both the rebound slide and rebound spring. The rebound slide controls trigger reset and return, ensuring smooth double-action operation and proper trigger function. Essential for maintaining reliable trigger performance in your lightweight concealed carry revolver.
About the Model 637
The Smith & Wesson Model 637 Airweight is a lightweight, compact J Frame revolver designed specifically for concealed carry. Featuring an aluminum alloy frame that reduces weight to approximately 15 ounces, the Model 637 is one of the lightest .38 Special revolvers available. The Model 637 features a visible hammer allowing both single-action and double-action operation, distinguishing it from hammerless models. Built on the compact J Frame, the Model 637 holds 5 rounds of .38 Special and is typically available with a 1 7/8 inch barrel for maximum concealability.
Airweight Construction
Airweight revolvers feature aluminum alloy frames that significantly reduce weight compared to steel-frame models. This makes them ideal for all-day concealed carry. The Model 637 weighs about 6 ounces less than its steel-frame counterpart (Model 60), making it one of the most popular choices for pocket or ankle carry. The lightweight design makes recoil more noticeable but enhances portability and comfort during extended carry.
Function & Compatibility
The rebound slide is a critical component in the trigger mechanism. When you pull the trigger, the rebound slide moves forward, allowing the trigger to travel. When you release the trigger, the rebound spring pushes the rebound slide backward, which resets the trigger to its forward position. This assembly is essential for both single-action and double-action operation.
This rebound slide assembly is specifically designed for Smith & Wesson J Frame Model 637 Airweight revolvers chambered in .38 Special. It may also fit other J Frame models with similar specifications - contact us to verify compatibility for your specific revolver.
J Frame Airweight Family
The Model 637 is part of Smith & Wesson's J Frame Airweight family, which includes the Model 638 (shrouded hammer Bodyguard), Model 642 (hammerless Centennial), and Model 340/360 (scandium alloy frames). These revolvers are extremely popular for concealed carry due to their light weight, small size, and reliability. The Model 637's exposed hammer allows for single-action shooting when precision is needed.
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. You should see "637" or a dash variant like "637-1", "637-2", etc. Model numbers began in 1957-58. Contact us with your serial number for assistance in identifying the correct parts for your specific Model 637 variant.
Installation & Specifications
- Professional gunsmith installation recommended
- Requires disassembly of grip frame and internal components
- Rebound spring must be properly seated for correct function
- Improper installation can cause trigger malfunction
- Factory OEM part manufactured to exact S&W specifications
- Used part inspected for wear and functionality
- Compatible with J Frame Model 637 Airweight revolvers
- Chambered for .38 Special (also fires .38 Special +P)
- May fit other J Frame models - verify compatibility
- Includes both rebound slide and spring
Trigger Performance Notes
The rebound slide assembly directly affects trigger feel and reset. A worn rebound slide can cause gritty trigger pull, inconsistent reset, or trigger binding. The rebound spring tension affects trigger return speed and feel. This assembly is essential for maintaining the smooth trigger action critical for accurate defensive shooting with lightweight concealed carry revolvers. The Model 637's light weight makes trigger control even more important for managing recoil and maintaining accuracy.
Condition Notes
This is a used OEM rebound slide assembly removed from a functioning Smith & Wesson Model 637 Airweight revolver. Shows normal wear consistent with use. All surfaces have been inspected for excessive wear or damage. Spring tension is good. Used parts may show finish wear or handling marks typical of carried revolvers. Guaranteed to function properly when correctly installed.
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 and can help you find the exact parts you need for your J Frame revolver.
Questions? Email sales@usagunsandgear.com or call 770-544-8075