{"product_id":"smith-wesson-k-frame-bolt-spring-plunger-models-17-18-1745b","title":"Smith \u0026 Wesson K Frame Bolt Spring \u0026 Plunger - Models 17 \u0026 18 - Old Style - Used - .22 LR 1745B","description":"\u003cp\u003e\u003cstrong\u003eFactory OEM Smith \u0026amp; Wesson K Frame Bolt Spring \u0026amp; Plunger\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1745B\u003cbr\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e K Frame Models 17 \u0026amp; 18\u003cbr\u003e\u003cstrong\u003eCaliber:\u003c\/strong\u003e .22 LR (Rimfire)\u003cbr\u003e\u003cstrong\u003eStyle:\u003c\/strong\u003e Old Style\u003cbr\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Used\u003cbr\u003e\u003cstrong\u003eFrame Size:\u003c\/strong\u003e K Frame\u003cbr\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt spring and plunger\u003c\/p\u003e\n\u003cp\u003eThis is an authentic Smith \u0026amp; Wesson factory bolt spring and plunger assembly for K Frame Models 17 and 18 revolvers. The bolt spring provides tension to the bolt (cylinder stop), ensuring proper engagement with the cylinder notches for reliable lockup and timing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Smith \u0026amp; Wesson factory part\u003c\/li\u003e\n\u003cli\u003eComplete assembly with spring and plunger\u003c\/li\u003e\n\u003cli\u003eOld-style configuration for early production models\u003c\/li\u003e\n\u003cli\u003eUsed condition with functional operation\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or damaged springs\u003c\/li\u003e\n\u003cli\u003eEssential for proper bolt tension and cylinder lockup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility Note:\u003c\/strong\u003e The bolt spring and plunger are interchangeable across all K Frame models, both rimfire and centerfire. This part will fit Models 10, 12, 13, 14, 15, 16, 17, 18, 19, 48, 64, 65, 66, 67, 617, and 648. The \"old style\" designation refers to earlier production variants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunction:\u003c\/strong\u003e The bolt spring provides upward tension on the bolt (cylinder stop), ensuring it properly engages the cylinder notches for reliable lockup. A weak or damaged spring can cause timing issues and cylinder misalignment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Professional gunsmith installation recommended. The bolt spring and plunger require internal disassembly and proper adjustment to ensure correct bolt tension and timing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to Identify Your Smith \u0026amp; Wesson Model:\u003c\/strong\u003e Swing out the cylinder and check behind the yoke on the frame for the model number. Model numbers began in 1957-58. If you need assistance identifying your revolver or confirming compatibility, contact us with your serial number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestions?\u003c\/strong\u003e Contact us at \u003ca href=\"mailto:sales@usagunsandgear.com\"\u003esales@usagunsandgear.com\u003c\/a\u003e or call 770-544-8075. We specialize in Smith \u0026amp; Wesson pistol and revolver parts - new, used, NOS, and refurbished.\u003c\/p\u003e","brand":"Smith and Wesson","offers":[{"title":"Default Title","offer_id":39638865936442,"sku":"1745B","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC01003_9dadfa51-0a75-4729-bde0-cde61ef1cacb.jpg?v=1656606147","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-k-frame-bolt-spring-plunger-models-17-18-1745b","provider":"USA Guns And Gear","version":"1.0","type":"link"}