{"product_id":"ruger-blackhawk-single-action-revolver-hammer-357-magnum-stainless-used-r4","title":"Ruger Blackhawk Single Action Revolver Hammer .357 Magnum Stainless Used - R4","description":"\u003ch2\u003eRuger Blackhawk Single Action Revolver Hammer — .357 Magnum, Stainless Steel, Used\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePart #R4 | Used | Ruger Blackhawk | Single Action | .357 Magnum | Stainless Steel\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eGenuine 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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e⚠️ Important — Verify Generation Before Ordering:\u003c\/strong\u003e The Ruger Blackhawk has been produced in three distinct generations, and hammer compatibility varies between them:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlattop (1955–1962):\u003c\/strong\u003e Original flat topstrap design; no transfer bar safety; earliest production\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOld Model \/ 3-Screw (1962–1973):\u003c\/strong\u003e Added topstrap rib; three frame screws; no transfer bar safety; uses a half-cock notch for loading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Model (1973–present):\u003c\/strong\u003e Transfer bar safety system introduced; different internal geometry; hammer profiles differ from Old Model\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eConfirm 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 \u003cstrong\u003enot interchangeable\u003c\/strong\u003e due to the transfer bar safety geometry change.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUsed Condition:\u003c\/strong\u003e 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.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e R4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Hammer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform:\u003c\/strong\u003e Ruger Blackhawk Single Action Revolver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .357 Magnum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAction:\u003c\/strong\u003e Single Action (SA)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used — inspected for mechanical soundness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003eHammer 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.\u003c\/p\u003e","brand":"Ruger","offers":[{"title":"Default Title","offer_id":22571300585530,"sku":"R4","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC02053.JPG?v=1571387168","url":"https:\/\/usagunsandgear.com\/products\/ruger-blackhawk-single-action-revolver-hammer-357-magnum-stainless-used-r4","provider":"USA Guns And Gear","version":"1.0","type":"link"}