{"product_id":"s-w-k-frame-model-15-combat-masterpiece-strain-screw-square-butt-38-special-used-part-15173b","title":"S\u0026W K Frame Model 15 Combat Masterpiece Strain Screw Square Butt .38 Special Used, Part# 15173B","description":"\u003ch2\u003eSmith \u0026amp; Wesson K Frame Model 15 Combat Masterpiece — Strain Screw, Square Butt, .38 Special\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart# 15173B | Used OEM Factory Part | K Frame\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace the mainspring strain screw on your Model 15 Combat Masterpiece with this genuine Smith \u0026amp; Wesson factory part. The strain screw controls mainspring tension, directly affecting trigger pull weight — a small part with a big impact on your revolver’s feel and reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart:\u003c\/strong\u003e Strain Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrip Frame:\u003c\/strong\u003e Square Butt\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\u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e Model 15 Combat Masterpiece\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used — genuine OEM factory part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Gunsmith fitting recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinding Your Model Number\u003c\/h3\u003e\n\u003cp\u003eSwing out the cylinder and check behind the yoke on the frame. Model numbers were introduced in 1957–58. If your revolver has no model number, it may pre-date 1957 — contact us with your serial number and we can help identify the correct part.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eFactory replacement parts are manufactured to the exact same specifications, tolerances, and materials as the originals.\u003c\/em\u003e\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41454800732218,"sku":"15173B","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSC00785_a206f1c4-1f85-433e-811c-1f187dc3ff80.jpg?v=1781027985","url":"https:\/\/usagunsandgear.com\/products\/s-w-k-frame-model-15-combat-masterpiece-strain-screw-square-butt-38-special-used-part-15173b","provider":"USA Guns And Gear","version":"1.0","type":"link"}