{"product_id":"smith-wesson-k-frame-trigger-with-hand-old-style-310-mim-stainless-used-66107f-b","title":"Smith \u0026 Wesson K Frame Trigger with Hand Old Style .310\" MIM Stainless Used Part 66107F","description":"\u003cp\u003e\u003cstrong\u003eSmith \u0026amp; Wesson K Frame Trigger with Hand — Old Style | .310\" MIM Stainless | Used | Part #66107F\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eFactory OEM trigger and hand assembly for Smith \u0026amp; Wesson K Frame revolvers. Old style design featuring .310\" trigger width, MIM (Metal Injection Molded) construction, and stainless steel finish. The integrated hand rotates the cylinder into alignment with each trigger pull for reliable double-action operation. Genuine S\u0026amp;W factory part in used condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eThis listing is for the trigger and hand assembly only.\u003c\/em\u003e Condition: Used, factory original.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 66107F\u003c\/li\u003e\n\u003cli\u003eFrame: K Frame\u003c\/li\u003e\n\u003cli\u003eTrigger Width: .310\"\u003c\/li\u003e\n\u003cli\u003eConstruction: MIM (Metal Injection Molded)\u003c\/li\u003e\n\u003cli\u003eFinish: Stainless Steel\u003c\/li\u003e\n\u003cli\u003eDesign: Old Style\u003c\/li\u003e\n\u003cli\u003eIncludes: Trigger + Integrated Hand\u003c\/li\u003e\n\u003cli\u003eCondition: Used \/ Factory Original OEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eModel Compatibility Chart\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 10\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 11\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eMilitary \u0026amp; Police\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 12\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eAirweight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 13\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 14\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eK-38 Masterpiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 15\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eCombat Masterpiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 16\u003c\/td\u003e\n\u003ctd\u003e.32 Long \/ .32 H\u0026amp;R\u003c\/td\u003e\n\u003ctd\u003eK-32 Masterpiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 17\u003c\/td\u003e\n\u003ctd\u003e.22 LR\u003c\/td\u003e\n\u003ctd\u003eK-22 Masterpiece (rimfire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 18\u003c\/td\u003e\n\u003ctd\u003e.22 LR\u003c\/td\u003e\n\u003ctd\u003eCombat Masterpiece (rimfire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 19\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003eCombat Magnum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 48\u003c\/td\u003e\n\u003ctd\u003e.22 Magnum\u003c\/td\u003e\n\u003ctd\u003eK-22 MRF (rimfire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 53\u003c\/td\u003e\n\u003ctd\u003e.22 Jet\u003c\/td\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 64\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 65\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 66\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003eCombat Magnum Stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 67\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 617\u003c\/td\u003e\n\u003ctd\u003e.22 LR\u003c\/td\u003e\n\u003ctd\u003eStainless (rimfire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 648\u003c\/td\u003e\n\u003ctd\u003e.22 Magnum\u003c\/td\u003e\n\u003ctd\u003eStainless (rimfire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eUnlike hammers, triggers and hands are interchangeable across all K Frame models regardless of caliber (centerfire and rimfire). Verify trigger width compatibility with your specific model before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe trigger controls the firing sequence in both single-action and double-action operation. The integrated hand engages the cylinder ratchet to rotate the cylinder one chamber per trigger pull, ensuring proper chamber-to-barrel alignment. Worn triggers cause inconsistent double-action pull weight and poor cylinder timing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGunsmith installation recommended. Trigger and hand fitting requires timing verification to ensure proper cylinder rotation and lockup. Incorrect installation can cause timing failures or cylinder binding.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41241907232826,"sku":"66107F","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC06892_0e0ae831-33de-42a0-bdc6-47054043be6a.jpg?v=1770905910","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-k-frame-trigger-with-hand-old-style-310-mim-stainless-used-66107f-b","provider":"USA Guns And Gear","version":"1.0","type":"link"}