{"product_id":"sw-model-22a-mainspring-hammer-spring-22lr-used-22a1-17","title":"S\u0026W Model 22A Mainspring Hammer Spring .22 LR Used, Part 22A1-17","description":"\u003cp\u003eFactory OEM Smith \u0026amp; Wesson mainspring (hammer spring) for the Model 22A-1 semi-automatic rimfire pistol. Used part in good working condition — spring tension verified functional.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 22A1-17\u003c\/li\u003e\n\u003cli\u003eCaliber: .22 Long Rifle (.22 LR)\u003c\/li\u003e\n\u003cli\u003ePart Type: Mainspring \/ Hammer Spring\u003c\/li\u003e\n\u003cli\u003eMaterial: Spring Steel\u003c\/li\u003e\n\u003cli\u003eCondition: Used \/ Surplus\u003c\/li\u003e\n\u003cli\u003eBrand: Smith \u0026amp; Wesson\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe mainspring drives the hammer forward under tension when released by the sear. Proper spring tension is critical for reliable rimfire ignition — a weak spring causes light strikes and misfires, while correct tension ensures consistent primer ignition every time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\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\u003eType\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 22A\u003c\/td\u003e\n\u003ctd\u003e.22 LR\u003c\/td\u003e\n\u003ctd\u003eSemi-Auto Pistol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 22A-1\u003c\/td\u003e\n\u003ctd\u003e.22 LR\u003c\/td\u003e\n\u003ctd\u003eSemi-Auto Pistol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 22S\u003c\/td\u003e\n\u003ctd\u003e.22 LR\u003c\/td\u003e\n\u003ctd\u003eSemi-Auto Pistol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA qualified gunsmith is recommended for installation. Verify trigger pull weight and test fire to confirm reliable ignition after installation.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41264880386106,"sku":"22A1-17","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSCF0001_ba2cf195-1e24-4781-b2e2-206791251967.jpg?v=1772031004","url":"https:\/\/usagunsandgear.com\/products\/sw-model-22a-mainspring-hammer-spring-22lr-used-22a1-17","provider":"USA Guns And Gear","version":"1.0","type":"link"}