{"product_id":"sw-k-frame-model-12-main-spring-38-special-k127","title":"Smith \u0026 Wesson K Frame Model 12 Main Spring, .38 Special – Part# K127","description":"\u003ch2\u003eSmith \u0026amp; Wesson K Frame Model 12 Main Spring — Part# K127\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Used, Old Style  |  \u003cstrong\u003eCaliber:\u003c\/strong\u003e .38 Special  |  \u003cstrong\u003eFrame:\u003c\/strong\u003e K Frame\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e K127\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Main Spring (Hammer Spring)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used — Original Smith \u0026amp; Wesson factory part\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Old Style\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .38 Special\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame Size:\u003c\/strong\u003e K Frame\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eModel Compatibility\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eModel\u003c\/th\u003e\n      \u003cth\u003eFrame\u003c\/th\u003e\n      \u003cth\u003eCaliber\u003c\/th\u003e\n      \u003cth\u003eCompatible\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eModel 12 (Airweight)\u003c\/td\u003e\n      \u003ctd\u003eK Frame\u003c\/td\u003e\n      \u003ctd\u003e.38 Special\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eNot sure if this fits your revolver? See below for how to identify your model number.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eHow to Identify Your S\u0026amp;W Model Number\u003c\/h3\u003e\n\u003cp\u003eSwing out the cylinder and check behind the yoke on the frame — the model number is stamped there. Model numbers began in 1957–58. If your revolver has no model number, it may pre-date 1957. In that case, \u003cstrong\u003econtact us with your serial number\u003c\/strong\u003e and we'll help identify the correct part.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eDisassembly and reassembly are required to replace this part. Installation by a qualified gunsmith is recommended. Factory replacement parts are manufactured to original S\u0026amp;W specifications and tolerances.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuestions?\u003c\/strong\u003e Call or email us — we're happy to help confirm fitment before you order.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":40932767072314,"sku":"K127","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/s-l960_27_535e37ff-423c-44b8-bbaa-1f4155eab997.webp?v=1751913136","url":"https:\/\/usagunsandgear.com\/products\/sw-k-frame-model-12-main-spring-38-special-k127","provider":"USA Guns And Gear","version":"1.0","type":"link"}