{"product_id":"smith-wesson-multi-model-pistol-mainspring-release-lever-104030000","title":"Smith \u0026 Wesson Multi-Model Pistol Mainspring Release Lever — New OEM Part 104030000","description":"\u003ch2\u003eSmith \u0026amp; Wesson Multi-Model Pistol Mainspring Release Lever — New OEM Factory Part\u003c\/h2\u003e\n\u003cp\u003eFactory new OEM mainspring release lever for multiple Smith \u0026amp; Wesson 3rd generation semi-automatic pistols, including TSW and compact CS series models. This genuine S\u0026amp;W replacement part (part #104030000) allows for safe disassembly of the mainspring assembly during maintenance and cleaning. A worn or damaged lever can make mainspring removal difficult or unsafe — this new OEM lever restores factory-correct function and ensures safe, reliable mainspring disassembly.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 104030000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Smith \u0026amp; Wesson\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Mainspring Release Lever\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibers:\u003c\/strong\u003e 9mm, .40 S\u0026amp;W, .45 ACP, 10mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneration:\u003c\/strong\u003e 3rd Generation (TSW \u0026amp; CS Series)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Factory New OEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eModel Compatibility Chart\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"border-bottom:2px solid #ddd;\"\u003e\n\u003cth style=\"text-align:left; padding:8px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding:8px;\"\u003eCaliber\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding:8px;\"\u003eSeries\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding:8px;\"\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 3906\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e9mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 3913, 3914\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e9mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen Compact\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 5903TSW, 5906TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e9mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCS9 (CS9C, CS9D, CS9S)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e9mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eChief's Special\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 4003TSW, 4006TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e.40 S\u0026amp;W\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 4013TSW, 4513TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e.40 S\u0026amp;W \/ .45 ACP\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen TSW Compact\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCS40 (CS40C, CS40D, CS40S)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e.40 S\u0026amp;W\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eChief's Special\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 4563TSW, 4566TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e.45 ACP\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen TSW\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eCS45 (CS45C, CS45D, CS45S)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e.45 ACP\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eChief's Special\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 1006, 1066\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e10mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✓ Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 3904, 5903, 5904, 5906 (non-TSW)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e9mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e3rd Gen\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e⚠ Verify fit — non-TSW variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eModel 39, 439, 539, 459, 559, 659\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e9mm\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1st\/2nd Gen\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✗ Not compatible — earlier generation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eM\u0026amp;P Series (all)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eVarious\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eModern\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e✗ Not compatible — striker-fired\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis listing is for the mainspring release lever only.\u003c\/strong\u003e Mainspring, pins, and other fire control parts are sold separately.\u003c\/li\u003e\n\u0026gt;li\u0026gt;This lever is specific to 3rd generation S\u0026amp;W semi-auto pistols, including TSW and CS (Chief's Special) compact variants. It is not compatible with 1st or 2nd generation models.\n\u0026gt;li\u0026gt;The CS series (CS9, CS40, CS45) are compact Chief's Special variants of the 3rd generation platform and share this lever.\n\u0026gt;li\u0026gt;Proper fitting may be required. Installation by a qualified gunsmith is recommended.\n\u0026gt;li\u0026gt;All Smith \u0026amp; Wesson factory parts are subject to availability and may require backorder processing.\n\u003c\/ul\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":7989200289850,"sku":"104030000","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC03260.jpg?v=1784216096","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-multi-model-pistol-mainspring-release-lever-104030000","provider":"USA Guns And Gear","version":"1.0","type":"link"}