{"product_id":"sw-j-frame-model-642-2-airweight-bolt-spring-plunger-mim-38-special-p-642c","title":"S\u0026W J Frame Model 642-2 Airweight Bolt, Spring \u0026 Plunger (MIM) .38 Special +P – Part# 642C","description":"\u003ch2\u003eSmith \u0026amp; Wesson J Frame Model 642-2 Airweight Bolt, Spring \u0026amp; Plunger (MIM) – Stainless Steel\u003c\/h2\u003e\n\n\u003cp\u003eRestore reliable cylinder rotation and lockup on your Model 642-2 Airweight with this factory-original MIM bolt, spring, and plunger set. The bolt (cylinder stop bolt) works in conjunction with the cylinder stop to index and lock each chamber in line with the barrel at the moment of firing — a worn or damaged bolt leads to cylinder timing issues and inconsistent lockup. This MIM (Metal Injection Molded) stainless steel three-piece set is the correct factory replacement for the J Frame Model 642-2 chambered in .38 S\u0026amp;W Special +P.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 642C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Smith \u0026amp; Wesson J Frame Model 642-2 Airweight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .38 S\u0026amp;W Special +P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt, Bolt Spring \u0026amp; Bolt Plunger\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e MIM (Metal Injection Molded)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used (factory original)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Gunsmith fitting recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAbout MIM Parts\u003c\/h3\u003e\n\u003cp\u003eMetal Injection Molding (MIM) is a precision manufacturing process used by Smith \u0026amp; Wesson and other major firearms manufacturers to produce complex internal components with tight tolerances and consistent quality. MIM parts are genuine factory components — not aftermarket substitutes — and meet the same specifications as traditionally machined parts.\u003c\/p\u003e\n\n\u003ch3\u003eFactory Replacement Quality\u003c\/h3\u003e\n\u003cp\u003eGenuine Smith \u0026amp; Wesson factory parts manufactured to the exact specifications and tolerances of the originals — same dimensions, same cylinder timing geometry, same reliable lockup. No aftermarket substitutes.\u003c\/p\u003e\n\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 have been stamped there since 1957–58. If your revolver has no model number, it predates that era — contact us with the serial number and we'll help identify the correct part.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuestions?\u003c\/strong\u003e Call or email us — we're happy to help you get the right part the first time.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":40852435075130,"sku":null,"price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/s-l960_5_77d7a891-b306-4f78-9313-3227f617d67d.webp?v=1745255767","url":"https:\/\/usagunsandgear.com\/products\/sw-j-frame-model-642-2-airweight-bolt-spring-plunger-mim-38-special-p-642c","provider":"USA Guns And Gear","version":"1.0","type":"link"}