{"product_id":"sw-k-frame-model-12-hammer-block-38-special-k129","title":"Smith \u0026 Wesson K Frame Model 12 Hammer Block, .38 Special - Part# K129","description":"\u003ch2\u003eSmith \u0026amp; Wesson K Frame Model 12 Hammer Block — Part# K129\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Used (OEM Factory Part)\u003cbr\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .38 Special\u003cbr\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e K Frame\u003cbr\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Old Style\u003cbr\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e K129\u003c\/p\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\u003eNotes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eModel 12\u003c\/td\u003e\n      \u003ctd\u003eK Frame\u003c\/td\u003e\n      \u003ctd\u003e.38 Special\u003c\/td\u003e\n      \u003ctd\u003eAirweight — Old Style Hammer Block\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSmith \u0026amp; Wesson factory OEM replacement part\u003c\/li\u003e\n  \u003cli\u003eManufactured to original factory specifications and tolerances\u003c\/li\u003e\n  \u003cli\u003eOld style design — verify compatibility with your specific serial number range before ordering\u003c\/li\u003e\n  \u003cli\u003eUsed condition — fully functional\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDisassembly and reassembly required\u003c\/li\u003e\n  \u003cli\u003eInstallation and fitting by a qualified gunsmith is recommended\u003c\/li\u003e\n\u003c\/ul\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 for the model number. Model numbers were introduced in 1957–58. If no model number is present, your revolver 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\u003cp\u003e\u003cstrong\u003eQuestions? Call or email us — we're happy to help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":40932764909626,"sku":"K129","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/s-l960_24_2bc77a2b-82e2-498e-8234-bb6feb48eeba.webp?v=1751912975","url":"https:\/\/usagunsandgear.com\/products\/sw-k-frame-model-12-hammer-block-38-special-k129","provider":"USA Guns And Gear","version":"1.0","type":"link"}