{"product_id":"smith-wesson-k-frame-model-66-cylinder-stop-spring-old-style-used-357","title":"Smith \u0026 Wesson K Frame Model 66 Cylinder Stop \u0026 Spring Old Style Used .357 Magnum","description":"\u003cp\u003e\u003cem\u003eThis listing is for the Smith \u0026amp; Wesson K Frame Model 66 Cylinder Stop \u0026amp; Spring, Old Style (Used OEM Part 6681A) only.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eUsed OEM Smith \u0026amp; Wesson Cylinder Stop \u0026amp; Spring assembly pulled from a K Frame Model 66 .357 Magnum revolver. This is the pre-MIM \u003cstrong\u003eold style\u003c\/strong\u003e cylinder stop, compatible with Model 66 variants 66-3 and earlier. The cylinder stop is a critical lockwork component that aligns the cylinder with the barrel at the moment of firing — a worn or broken stop results in misalignment and unreliable ignition.\u003c\/p\u003e\n\n\u003ch4\u003ePart Details\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 6681A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .357 Magnum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e K Frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Old Style (Pre-MIM)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eModel Compatibility\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eDash\u003c\/th\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmith \u0026amp; Wesson\u003c\/td\u003e\n\u003ctd\u003eModel 66\u003c\/td\u003e\n\u003ctd\u003e66, 66-1, 66-2, 66-3\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003e✓ Yes — Old Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmith \u0026amp; Wesson\u003c\/td\u003e\n\u003ctd\u003eModel 66\u003c\/td\u003e\n\u003ctd\u003e66-4 and later (MIM)\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003e✗ No — requires new style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmith \u0026amp; Wesson\u003c\/td\u003e\n\u003ctd\u003eOther K Frame models\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eVerify before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003ePer S\u0026amp;W engineering history, the 66-4 introduced MIM lockwork. Old and new style cylinder stops are NOT interchangeable. Verify your dash number before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Note\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eGunsmith Recommended:\u003c\/strong\u003e Cylinder stop replacement requires side plate removal and action disassembly. Fitting and timing verification by a qualified gunsmith is strongly recommended. Always function test after installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWe only ship to addresses within the United States.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41628765519930,"sku":"6681A","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC00816_5c951b0d-d517-4b58-82bc-663b4d72936d.jpg?v=1788358579","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-k-frame-model-66-cylinder-stop-spring-old-style-used-357","provider":"USA Guns And Gear","version":"1.0","type":"link"}