Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000

Ruger Blackhawk Single Action Revolver Hammer .357 Magnum Stainless Used - R4

$39.99
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Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
  • Smith & Wesson R4 Ruger Single Action Revolver Black Hawk Hammer Used Part .357 Magnum Part 000000000
Ruger Blackhawk Single Action Revolver Hammer .357 Magnum Stainless Used - R4

Ruger Blackhawk Single Action Revolver Hammer .357 Magnum Stainless Used - R4

$39.99

Ruger Blackhawk Single Action Revolver Hammer — .357 Magnum, Stainless Steel, Used

Part #R4 | Used | Ruger Blackhawk | Single Action | .357 Magnum | Stainless Steel

Genuine used Ruger stainless steel hammer for the Blackhawk single-action revolver in .357 Magnum. The hammer drives the firing pin to ignite the primer on a single-action pull; on the Blackhawk, the hammer must be manually cocked before each shot. A chipped, cracked, or worn hammer notch or spur affects cocking reliability, trigger reset, and safe half-cock function.

⚠️ Important — Verify Generation Before Ordering: The Ruger Blackhawk has been produced in three distinct generations, and hammer compatibility varies between them:

  • Flattop (1955–1962): Original flat topstrap design; no transfer bar safety; earliest production
  • Old Model / 3-Screw (1962–1973): Added topstrap rib; three frame screws; no transfer bar safety; uses a half-cock notch for loading
  • New Model (1973–present): Transfer bar safety system introduced; different internal geometry; hammer profiles differ from Old Model

Confirm your Blackhawk’s generation (check the number of frame screws and presence of a transfer bar) before ordering. Old Model and New Model hammers are generally not interchangeable due to the transfer bar safety geometry change.

Used Condition: Genuine used OEM Ruger part. Expect normal handling marks and finish wear consistent with a used action component. Stainless steel finish. Inspected for mechanical soundness before listing — no cracks, chips, or damaged notches observed. Cosmetic condition varies.

Specifications

  • Part Number: R4
  • Type: Hammer
  • Platform: Ruger Blackhawk Single Action Revolver
  • Caliber: .357 Magnum
  • Material: Stainless Steel
  • Action: Single Action (SA)
  • Condition: Used — inspected for mechanical soundness

Installation

Hammer replacement requires action disassembly. Professional gunsmith installation strongly recommended. Verify function of all safety notches (full cock, half cock, and transfer bar if New Model) before live fire.

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