A photo showing a used Smith & Wesson K Frame Model 66 bolt, spring, and plunger assembly for a .357 Magnum revolver, displayed on a white stand with a label providing product details.

Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1

$12.99
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A photo showing a used Smith & Wesson K Frame Model 66 bolt, spring, and plunger assembly for a .357 Magnum revolver, displayed on a white stand with a label providing product details.
  • A photo showing a used Smith & Wesson K Frame Model 66 bolt, spring, and plunger assembly for a .357 Magnum revolver, displayed on a white stand with a label providing product details.
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • A photo showing a used Smith & Wesson K Frame Model 66 bolt, spring, and plunger assembly for a .357 Magnum revolver, displayed on a white stand with a label providing product details.
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
  • Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1
Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1

Smith & Wesson K Frame Model 66 Bolt Spring & Plunger Old Style .357 Magnum Used - 66AA1

$12.99

Smith & Wesson K Frame Model 66 Bolt, Spring & Plunger — Used OEM Part

Genuine Smith & Wesson factory bolt, spring, and plunger assembly for the K Frame Model 66 revolver, chambered in .357 Magnum. Old style construction. Removed from a used firearm and in good working condition. A direct OEM replacement for a worn, damaged, or missing bolt assembly.

The bolt (cylinder stop) locks the cylinder in alignment with the barrel at the moment of firing, ensuring safe and accurate operation.

Part Details

  • Part Number: 66AA1
  • Condition: Used OEM
  • Frame: K Frame
  • Compatible Model: Model 66 (.357 Magnum)
  • Style: Old Style
  • Includes: Bolt, Spring & Plunger

Compatibility Note

This is the old style bolt assembly specific to the K Frame Model 66. Verify your model number and dash number before ordering — old and new style bolt assemblies are not interchangeable. To find your model number, swing out the cylinder and check the frame behind the yoke.

Installation

Replacement requires disassembly of the action. Installation by a qualified gunsmith is recommended.

Questions? Call or email us — we carry new, used, and new old stock S&W parts for the full K Frame lineup.

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