{"product_id":"smith-wesson-revolver-k-frame-model-19-5-357-magnum-strain-screw-round-butt-19172b","title":"Smith \u0026 Wesson K Frame Model 19-5 .357 Magnum Strain Screw Round Butt 19172B","description":"\u003ch2\u003eSmith \u0026amp; Wesson K Frame Model 19-5 Strain Screw – Round Butt\u003c\/h2\u003e\u003cp\u003eRestore proper mainspring tension and trigger pull consistency in your Model 19-5 with this genuine Smith \u0026amp; Wesson factory strain screw. The strain screw threads into the grip frame and bears against the mainspring, directly controlling hammer fall force — a small but critical component for reliable ignition in any K Frame .357 Magnum revolver.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 19172B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e S\u0026amp;W K Frame Model 19-5 – Round Butt configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .357 Magnum \/ .38 Special\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Pre-owned, inspected component\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Genuine Smith \u0026amp; Wesson factory replacement part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility Note\u003c\/h3\u003e\u003cp\u003eThis strain screw is designed for the \u003cstrong\u003eround butt\u003c\/strong\u003e variant of the Model 19-5. To confirm your model number and dash number, swing out the cylinder and check behind the yoke on the frame. The dash number (e.g. –19-5”) indicates the engineering change level and may affect parts compatibility.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003eDisassembly and reassembly are required to replace this part. Installation by a qualified gunsmith is recommended. Factory replacement parts are manufactured to the exact same specifications, tolerances, and materials as the originals.\u003c\/p\u003e\u003cp\u003eQuestions? Shoot us an email or give us a call — we’re here for all your S\u0026amp;W needs. – USA Guns And Gear\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41459847987258,"sku":"19172B","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSCF0001_c8280a89-9a03-4645-bcee-ab5a5a98f38c.jpg?v=1781184453","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-revolver-k-frame-model-19-5-357-magnum-strain-screw-round-butt-19172b","provider":"USA Guns And Gear","version":"1.0","type":"link"}