{"product_id":"smith-wesson-model-43-airweight-j-frame-bolt-spring-plunger-blue-steel-22lr-45-43-c","title":"Smith \u0026 Wesson Model 43 Airweight J Frame Bolt, Spring \u0026 Plunger Blue Steel .22 LR, Part# 45-43-C","description":"\u003ch2\u003eSmith \u0026amp; Wesson Model 43 Airweight Bolt, Spring \u0026amp; Plunger – Part# 45-43-C\u003c\/h2\u003e\u003cp\u003eThis is a genuine factory Smith \u0026amp; Wesson bolt, spring, and plunger set for the J Frame Model 43 (.22\/.32 Kit Gun Airweight) revolver chambered in .22 Long Rifle. A used blue steel set in serviceable condition — a cost-effective solution for restoring proper cylinder lockup on your Model 43 Airweight.\u003c\/p\u003e\u003cp\u003eIn S\u0026amp;W revolver terminology, the bolt (also called the cylinder stop) rises to lock the cylinder in precise alignment with the barrel at the moment of firing. The plunger drives the bolt upward into the cylinder notch, and the spring provides the tension to keep it engaged. A worn, chipped, or broken bolt, fatigued spring, or damaged plunger results in cylinder wobble, poor lockup, and degraded accuracy or reliability.\u003c\/p\u003e\u003ch3\u003ePart Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 45-43-C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Name:\u003c\/strong\u003e Bolt, Spring \u0026amp; Plunger (Cylinder Stop Assembly)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Blue Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used, factory original\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e J Frame (Airweight — alloy frame)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .22 Long Rifle (rimfire)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt (cylinder stop) + spring + plunger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Locks cylinder in barrel alignment at moment of firing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eModel Compatibility\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003cth\u003eFrame\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 43 Airweight (.22\/.32 Kit Gun)\u003c\/td\u003e\n\u003ctd\u003e.22 LR (rimfire)\u003c\/td\u003e\n\u003ctd\u003eJ Frame Alloy\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 43C\u003c\/td\u003e\n\u003ctd\u003e.22 LR (rimfire)\u003c\/td\u003e\n\u003ctd\u003eJ Frame Alloy\u003c\/td\u003e\n\u003ctd\u003e⚠️ Verify fitment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 317 (Kit Gun)\u003c\/td\u003e\n\u003ctd\u003e.22 LR (rimfire)\u003c\/td\u003e\n\u003ctd\u003eJ Frame Alloy\u003c\/td\u003e\n\u003ctd\u003e⚠️ Verify fitment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 34 (.22\/.32 Kit Gun)\u003c\/td\u003e\n\u003ctd\u003e.22 LR (rimfire)\u003c\/td\u003e\n\u003ctd\u003eJ Frame Steel\u003c\/td\u003e\n\u003ctd\u003e⚠️ Verify fitment — different frame material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 63\u003c\/td\u003e\n\u003ctd\u003e.22 LR (rimfire)\u003c\/td\u003e\n\u003ctd\u003eJ Frame Stainless\u003c\/td\u003e\n\u003ctd\u003e⚠️ Verify fitment — different finish \u0026amp; frame material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 36 \/ 37 \/ 38\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eJ Frame\u003c\/td\u003e\n\u003ctd\u003e⚠️ Verify fitment — centerfire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK \/ L \/ N Frame\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eLarger frames\u003c\/td\u003e\n\u003ctd\u003e❌ Different frame size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eNote: The Model 43 Airweight uses an alloy (aluminum) frame — parts may not interchange with steel or stainless J Frame revolvers. This bolt set is blue steel finish. Bolt assemblies are frame-specific and not interchangeable between J, K, L, or N Frame revolvers. Always confirm your exact model before ordering. Model numbers are stamped on the frame behind the yoke when the cylinder is swung out. Pre-1957 revolvers may not have a model number — contact us with your serial number for assistance.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003eBolt, spring, and plunger replacement requires side plate removal and disassembly of the lock work. Cylinder timing must be verified after installation to ensure safe, reliable lockup. We recommend installation by a qualified gunsmith.\u003c\/p\u003e\u003cp\u003eQuestions about fitment? Call or email us — we're happy to help.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":40804816289850,"sku":"45-43-C","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSC06579.jpg?v=1741629100","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-model-43-airweight-j-frame-bolt-spring-plunger-blue-steel-22lr-45-43-c","provider":"USA Guns And Gear","version":"1.0","type":"link"}