{"product_id":"smith-wesson-revolver-k-frame-model-18-3-22-long-rifle-ctg-blue-steel-strain-screw-square-butt-18173","title":"Smith \u0026 Wesson K Frame Model 18-3 Strain Screw, Blue Steel, Square Butt, Old Style, Used, Part# 18173","description":"\u003ch2\u003eSmith \u0026amp; Wesson K Frame Model 18-3 Strain Screw\u003c\/h2\u003e\u003cp\u003eA genuine used Smith \u0026amp; Wesson strain screw pulled from a Model 18-3 revolver. The strain screw controls mainspring tension, directly affecting trigger pull weight and hammer strike force — a small part with a big impact on your revolver's performance. This blue steel, old-style square butt variant is the correct replacement for restoring your K Frame .22 LR to factory specification.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Smith \u0026amp; Wesson K Frame — Model 18-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .22 Long Rifle (rimfire)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Blue Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame Style:\u003c\/strong\u003e Square Butt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Old Style\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used, original factory part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18173\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eNote: Strain screw tension affects trigger pull and ignition reliability. Use the correct part for your specific frame style (square vs. round butt) to ensure proper fit and function.\u003c\/em\u003e\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41490291982394,"sku":"18173","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSCF0001_7691fa53-1dca-4cf9-aa39-5a4882f5b7d1.jpg?v=1782497772","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-revolver-k-frame-model-18-3-22-long-rifle-ctg-blue-steel-strain-screw-square-butt-18173","provider":"USA Guns And Gear","version":"1.0","type":"link"}