Smith & Wesson K Frame Model 66 Cylinder Stop with Spring - Stainless Steel .357 Magnum 6681D

Smith & Wesson Model 66 Cylinder Stop with Spring

Genuine Smith & Wesson factory cylinder stop (bolt) with spring for Model 66 Combat Magnum revolvers. The cylinder stop is a critical timing component that locks the cylinder in proper alignment with the barrel for each shot, ensuring safe and accurate operation. This stainless steel assembly includes both the cylinder stop and its spring.

Key Features:

• Factory S&W cylinder stop with spring in used condition
• Stainless steel construction
• Locks cylinder in proper alignment for safe firing
• Critical timing component for reliable operation
• Old style configuration
• Complete assembly ready to install
• Ideal for restoration or replacement projects

Compatibility:

Designed for Smith & Wesson K Frame Model 66 Combat Magnum revolvers chambered in .357 Magnum. Cylinder stops and other internal timing components typically interchange across K Frame models of the same era, though professional fitting may be required to ensure proper timing and lockup.

Installation Notes:

Professional gunsmith installation and fitting required. Disassembly and reassembly of the revolver's action is required. Proper installation and timing are critical for safe operation—the cylinder stop must engage the cylinder notches at precisely the right moment to ensure proper alignment. Some fitting may be necessary to achieve correct timing and lockup.

Specifications:

• Part Number: 6681D
• Model: 66 Combat Magnum
• Frame Size: K Frame (Medium Frame)
• Caliber: .357 Magnum
• Part Type: Cylinder Stop (Bolt) with Spring
• Material: Stainless Steel
• Style: Old Style
• Condition: Used
• Manufacturer: Smith & Wesson

About the Cylinder Stop:

The cylinder stop, also called the bolt, is one of the most important timing components in a revolver. It pops up through the frame to engage notches in the cylinder, locking it in perfect alignment with the barrel at the moment of firing. Proper cylinder stop function is essential for accuracy, safety, and preventing cylinder endshake.

About the Model 66:

The Smith & Wesson Model 66 Combat Magnum, introduced in 1970, is the stainless steel version of the legendary Model 19. Built on the K Frame platform, it was designed to handle the powerful .357 Magnum cartridge while offering the corrosion resistance of stainless steel construction. The Model 66 became a favorite among law enforcement and civilian shooters for its combination of power, accuracy, and durability.