{"title":"Smith \u0026 Wesson Model 439 Pistol Parts - 9mm Second Gen","description":"\u003ch2\u003eSmith \u0026amp; Wesson Model 439 Pistol Parts\u003c\/h2\u003e\u003cp\u003eAuthentic OEM parts for the Smith \u0026amp; Wesson Model 439 semi-automatic pistol. A Second Generation 9mm pistol with single-stack design, the Model 439 is a classic duty pistol. We stock quality-inspected parts for restoration, repair, and maintenance.\u003c\/p\u003e\u003ch3\u003eModel 439 Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 439 (Second Generation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 9mm Luger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 8+1 rounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAction:\u003c\/strong\u003e Double-action\/single-action (DA\/SA)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Blue steel slide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction:\u003c\/strong\u003e 1980-1988\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAbout the Model 439\u003c\/h3\u003e\u003cp\u003eIntroduced in 1980, the Model 439 was Smith \u0026amp; Wesson's Second Generation 9mm pistol with single-stack magazine. Featuring an aluminum alloy frame and blue steel slide, it was popular with law enforcement agencies. The compact single-stack design made it ideal for concealed carry. These authentic OEM parts help preserve these classic pistols.\u003c\/p\u003e","products":[{"product_id":"smith-wesson-revolver-rear-sight-body-plunger-spring-m-and-p","title":"S\u0026W Rear Sight Body Plunger Spring 105730000 - Model 1006 3904 3944 439","description":"\u003ch2\u003eSmith \u0026amp; Wesson Rear Sight Body Plunger Spring - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new rear sight body plunger spring (Part #105730000) for multiple 9mm, 10mm, and .45 ACP pistol models. Essential component for adjustable rear sight operation.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9mm Models:\u003c\/strong\u003e 439, 459, 539, 559, 639, 659, 3904, 3906, 3944, 3946, 5903, 5904, 5906\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm Models:\u003c\/strong\u003e 1006\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.45 ACP Models:\u003c\/strong\u003e 645, 4506\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003ePrecision-manufactured spring steel\u003c\/li\u003e\n\u003cli\u003eCritical component for rear sight body\u003c\/li\u003e\n\u003cli\u003eEnsures proper sight plunger tension\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or weakened springs\u003c\/li\u003e\n\u003cli\u003eMaintains sight adjustment integrity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\u003cp\u003eRear sight plunger spring installation requires proper disassembly of the rear sight assembly. Professional gunsmith installation recommended to ensure correct function and sight retention.\u003c\/p\u003e\u003cp\u003eMaintain reliable rear sight operation in your Smith \u0026amp; Wesson pistol with this genuine factory replacement spring.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":32839326986,"sku":"105730000","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC00601_34fd1c9b-e18a-47b4-896a-983b1134f4b0.jpg?v=1689187319"},{"product_id":"smith-wesson-pistol-models-1006-39-3904-3906-3944-3946-439-539-639-4506-645-59-459-659-5903-5904-5906-part-rear-sight-windage-screw-068480000","title":"S\u0026W Rear Sight Windage Screw - Model 39, 439, 539, 639 \u0026 More - 068480000","description":"\u003ch2\u003eSmith \u0026amp; Wesson Rear Sight Windage Screw - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new rear sight windage screw (Part #068480000) for precise sight adjustment and secure retention.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel 39 Series:\u003c\/strong\u003e 39, 439, 539, 639\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel 59 Series:\u003c\/strong\u003e 59, 459, 659\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3rd Generation:\u003c\/strong\u003e 3904, 3906, 3944, 3946, 5903, 5904, 5906\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4th Generation:\u003c\/strong\u003e 1006, 4506, 645\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003ePrecision-machined threads for secure fit\u003c\/li\u003e\n\u003cli\u003eEssential for rear sight windage adjustment\u003c\/li\u003e\n\u003cli\u003eDurable steel construction\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or damaged screws\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eKeep your Smith \u0026amp; Wesson pistol sights properly adjusted with this genuine factory replacement screw. Professional installation recommended for optimal results.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":40692823188,"sku":"068480000","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/100_2130.JPG?v=1571386130"},{"product_id":"s-w-magazine-release-plunger-39-3904-3914-3944-3954-439-539-4004-4054-411-59-459-559-5904-5924-5943ssv-5944-915-469-6924","title":"S\u0026W Magazine Release Plunger - Model 39, 439, 539, 59 \u0026 More - 068290001","description":"\u003ch2\u003eSmith \u0026amp; Wesson Magazine Release Plunger - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new magazine release plunger (Part #068290001) for reliable magazine ejection and smooth operation.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel 39 Series:\u003c\/strong\u003e 39, 439, 539\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel 59 Series:\u003c\/strong\u003e 59, 459, 559, 5904, 5924, 5943SSV, 5944\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3rd Generation 9mm:\u003c\/strong\u003e 3904, 3914, 3944, 3954, 469, 915, 6924\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.40 S\u0026amp;W Models:\u003c\/strong\u003e 411, 4004, 4054\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003ePrecision-engineered for smooth magazine release\u003c\/li\u003e\n\u003cli\u003eCritical component for magazine catch assembly\u003c\/li\u003e\n\u003cli\u003eDurable steel construction for long service life\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or damaged plungers\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRestore reliable magazine function to your Smith \u0026amp; Wesson semi-automatic pistol with this genuine factory replacement plunger.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41835036052,"sku":"068290001","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSCN4707.jpg?v=1637683587"},{"product_id":"smith-wesson-pistol-grip-stock-screw-model-39-59-430-539-459-559","title":"S\u0026W Pistol Grip Screw 39, 439, 539, 59, 459, 559 062640001","description":"\u003ch2\u003eSmith \u0026amp; Wesson Pistol Grip Screw - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new grip screw (Part #062640001) for secure grip panel attachment.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel 39 Series:\u003c\/strong\u003e 39, 439, 539\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel 59 Series:\u003c\/strong\u003e 59, 459, 559\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003eBlue\/black finish matches factory specifications\u003c\/li\u003e\n\u003cli\u003ePrecision-threaded for secure grip retention\u003c\/li\u003e\n\u003cli\u003eEssential hardware for grip panel installation\u003c\/li\u003e\n\u003cli\u003eDurable steel construction for long service life\u003c\/li\u003e\n\u003cli\u003eDirect replacement for lost or damaged screws\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\u003cp\u003eProper torque is essential to prevent grip panel movement while avoiding over-tightening. Professional gunsmith installation recommended for optimal results.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":42879380820,"sku":"062640001","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSCN5432.png?v=1628176755"},{"product_id":"smith-wesson-magazine-floorplate-pistol-part-model-39-439-539","title":"S\u0026W Magazine Floor Plate - Model 39, 439, 539 - 061850000","description":"\u003ch2\u003eSmith \u0026amp; Wesson Magazine Floor Plate - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new magazine floor plate (Part #061850000) for secure magazine base retention and professional appearance.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eModel 39 Series:\u003c\/strong\u003e 39, 439, 539\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003ePrecision-manufactured for exact fit\u003c\/li\u003e\n\u003cli\u003eEssential component for magazine assembly\u003c\/li\u003e\n\u003cli\u003eDurable steel construction with factory finish\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or damaged floor plates\u003c\/li\u003e\n\u003cli\u003eMaintains proper magazine spring tension\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eKeep your Smith \u0026amp; Wesson Model 39 series magazines in top condition with this genuine factory replacement floor plate. Ensures reliable feeding and professional appearance.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":7990428237882,"sku":"061850000","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC03280.png?v=1628176180"},{"product_id":"smith-wesson-revolver-part-new-magazine-release-model-39-436-539","title":"S\u0026W Magazine Release Model 39, 436, 539 064740001","description":"\u003ch2\u003eSmith \u0026amp; Wesson Magazine Release - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new magazine release (Part #064740001) for secure magazine retention and smooth operation. Complete assembly for Model 39 series pistols.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eModel 39 Series:\u003c\/strong\u003e 39, 436, 539\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003eComplete magazine release assembly\u003c\/li\u003e\n\u003cli\u003ePrecision-manufactured for reliable operation\u003c\/li\u003e\n\u003cli\u003eEnsures positive magazine retention\u003c\/li\u003e\n\u003cli\u003eSmooth, consistent release action\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or damaged releases\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\u003cp\u003eMagazine release installation requires proper disassembly and reassembly. Professional gunsmith installation recommended to ensure correct function and proper fit.\u003c\/p\u003e\u003cp\u003eMaintain reliable magazine function in your Smith \u0026amp; Wesson pistol with this genuine factory magazine release.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":20600327471162,"sku":"","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC07707.JPG?v=1628011420"},{"product_id":"smith-wesson-rear-sight-plunger-063780000","title":"Smith \u0026 Wesson Rear Sight Plunger Models 39 59 439 539 639 459 559 659 Factory OEM 063780000","description":"\u003ch2\u003eSmith \u0026amp; Wesson Rear Sight Plunger - Factory OEM Part\u003c\/h2\u003e\u003cp\u003eThis is a genuine \u003cstrong\u003eSmith \u0026amp; Wesson factory OEM rear sight plunger\u003c\/strong\u003e for 2nd and 3rd Generation semi-automatic pistols. Part number \u003cstrong\u003e063780000\u003c\/strong\u003e is a critical component that secures the rear sight to the slide and provides the spring tension necessary for windage adjustments.\u003c\/p\u003e\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Smith \u0026amp; Wesson\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 063780000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Factory New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Models 39, 439, 539, 639, 59, 459, 559, 659, and more (see full list below)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Rear sight plunger\/detent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 oz\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Models\u003c\/h3\u003e\u003cp\u003eThis rear sight plunger is compatible with the following Smith \u0026amp; Wesson semi-automatic pistol models:\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2nd Generation (Model 39\/59 Series):\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel 39 - 9mm, single-stack, alloy frame\u003c\/li\u003e\n\u003cli\u003eModel 439 - 9mm, single-stack, alloy frame, improved\u003c\/li\u003e\n\u003cli\u003eModel 539 - 9mm, single-stack, steel frame\u003c\/li\u003e\n\u003cli\u003eModel 639 - 9mm, single-stack, stainless steel\u003c\/li\u003e\n\u003cli\u003eModel 59 - 9mm, double-stack, alloy frame\u003c\/li\u003e\n\u003cli\u003eModel 459 - 9mm, double-stack, alloy frame, improved\u003c\/li\u003e\n\u003cli\u003eModel 559 - 9mm, double-stack, steel frame\u003c\/li\u003e\n\u003cli\u003eModel 659 - 9mm, double-stack, stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003e3rd Generation Models:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel 1006 - 10mm Auto, stainless steel\u003c\/li\u003e\n\u003cli\u003eModel 3904, 3906, 3944, 3946 - 9mm compact variants\u003c\/li\u003e\n\u003cli\u003eModel 4506 - .45 ACP, stainless steel\u003c\/li\u003e\n\u003cli\u003eModel 5903, 5904, 5906 - 9mm full-size variants\u003c\/li\u003e\n\u003cli\u003eModel 645 - .45 ACP, stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAbout This Part\u003c\/h3\u003e\u003cp\u003eThe rear sight plunger is a vital component of the adjustable rear sight system on Smith \u0026amp; Wesson semi-automatic pistols. This precision-manufactured plunger fits into a hole in the slide and applies spring pressure against the rear sight body. This spring tension serves two critical functions:\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1. Sight Retention:\u003c\/strong\u003e The plunger keeps the rear sight securely seated in the dovetail cut on the slide, preventing it from shifting or moving during firing and handling.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2. Windage Adjustment:\u003c\/strong\u003e The spring pressure allows the rear sight to be adjusted for windage (left\/right) by tapping it with a sight adjustment tool or brass punch. The plunger provides resistance that holds the sight in the adjusted position while still allowing precise movement when needed.\u003c\/p\u003e\u003cp\u003eWithout a properly functioning rear sight plunger, the rear sight can shift during recoil, causing point of impact changes and accuracy problems. The plunger must provide consistent spring pressure to maintain zero while allowing windage adjustments when needed.\u003c\/p\u003e\u003cp\u003eA worn, damaged, or missing rear sight plunger can cause the rear sight to shift position, move during firing, or fall out of the dovetail. Replacing it with a genuine Smith \u0026amp; Wesson factory part ensures proper sight retention and reliable zero maintenance.\u003c\/p\u003e\u003ch3\u003eWhy Choose Factory OEM Parts?\u003c\/h3\u003e\u003cp\u003eWhen it comes to critical sight components like the rear sight plunger, using genuine Smith \u0026amp; Wesson factory parts ensures:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise dimensions:\u003c\/strong\u003e Manufactured to exact Smith \u0026amp; Wesson specifications for proper fit in slide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable retention:\u003c\/strong\u003e Correct spring rate ensures secure sight positioning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality materials:\u003c\/strong\u003e Proper steel composition ensures durability and resistance to wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerfect compatibility:\u003c\/strong\u003e Designed specifically for 2nd and 3rd Generation pistols\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-lasting performance:\u003c\/strong\u003e Factory parts are built to withstand thousands of rounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety assurance:\u003c\/strong\u003e OEM parts meet Smith \u0026amp; Wesson's strict quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003eInstallation of the rear sight plunger requires removal of the rear sight from the slide. This work should be performed by a qualified gunsmith if you are not experienced with sight installation and adjustment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation overview:\u003c\/strong\u003e\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eEnsure the pistol is completely unloaded and remove the slide\u003c\/li\u003e\n\u003cli\u003eDrift the rear sight out of the dovetail using a sight pusher or brass punch\u003c\/li\u003e\n\u003cli\u003eRemove the old rear sight plunger from the slide (if present)\u003c\/li\u003e\n\u003cli\u003eInstall the new factory rear sight plunger into the slide hole\u003c\/li\u003e\n\u003cli\u003eReinstall the rear sight into the dovetail, ensuring proper alignment\u003c\/li\u003e\n\u003cli\u003eVerify the sight is secure and properly retained\u003c\/li\u003e\n\u003cli\u003eAdjust windage as needed and verify zero\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Always follow proper firearm safety procedures. Ensure your pistol is unloaded before performing any maintenance or parts replacement. Verify proper sight retention and zero after installation.\u003c\/p\u003e\u003ch3\u003eAbout Smith \u0026amp; Wesson 2nd and 3rd Generation Pistols\u003c\/h3\u003e\u003cp\u003eSmith \u0026amp; Wesson's 2nd Generation (Model 39\/59 series, 1970s-1980s) and 3rd Generation (four-digit models, 1980s-2000s) semi-automatic pistols are renowned for their quality construction, reliability, and accuracy. These pistols feature adjustable rear sights that allow shooters to fine-tune their point of impact. The rear sight plunger is essential for maintaining sight zero and ensuring consistent accuracy. Maintaining these classic pistols with genuine factory parts ensures they continue to deliver the accuracy and reliability they're known for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This is a factory-new OEM part from Smith \u0026amp; Wesson. Always verify part compatibility with your specific pistol model before ordering.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":22313783918650,"sku":"063780000","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC00270.JPG?v=1571386962"},{"product_id":"smith-wesson-pistol-model-439-539-39-magazine-release-nut-blue-new-part","title":"S\u0026W Magazine Release Nut - Model 39, 439, 539 Blue - 244650000","description":"\u003ch2\u003eSmith \u0026amp; Wesson Magazine Release Nut - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new magazine release nut in blue finish (Part #244650000) for secure magazine catch assembly.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eModel 39 Series:\u003c\/strong\u003e 39, 439, 539\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003eBlue steel finish matches original factory specifications\u003c\/li\u003e\n\u003cli\u003ePrecision-threaded for secure magazine catch retention\u003c\/li\u003e\n\u003cli\u003eEssential component for magazine release assembly\u003c\/li\u003e\n\u003cli\u003eDurable steel construction for long service life\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or damaged nuts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\u003cp\u003eThis nut secures the magazine catch to the frame and must be properly torqued for reliable magazine retention. Professional gunsmith installation recommended to ensure correct assembly and function.\u003c\/p\u003e\u003cp\u003eRestore your Smith \u0026amp; Wesson Model 39 series pistol to factory specifications with this genuine OEM replacement part.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":22512512565306,"sku":"","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC01505.JPG?v=1571387034"},{"product_id":"lever-spring-s-w-439-539-645-745-59-459-559-659-469-669-new","title":"104230000 Lever Spring S\u0026W 439, 539, 645, 745, 59, 459, 559, 659, 469, 669 New","description":"\u003ch2\u003eSmith \u0026amp; Wesson Lever Spring - Factory New OEM Part\u003c\/h2\u003e\u003cp\u003eGenuine Smith \u0026amp; Wesson factory new lever spring (Part #104230000) for multiple 9mm, .40 S\u0026amp;W, and .45 ACP pistol models. Critical component for internal mechanism operation.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9mm Models:\u003c\/strong\u003e 59, 459, 469, 559, 659, 669\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.40 S\u0026amp;W Models:\u003c\/strong\u003e 439, 539\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.45 ACP Models:\u003c\/strong\u003e 645, 745\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition - authentic S\u0026amp;W OEM part\u003c\/li\u003e\n\u003cli\u003ePrecision-manufactured spring steel\u003c\/li\u003e\n\u003cli\u003eCritical component for lever mechanism\u003c\/li\u003e\n\u003cli\u003eEnsures proper lever function\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn or weakened springs\u003c\/li\u003e\n\u003cli\u003eMaintains reliable operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\u003cp\u003eLever spring installation requires proper disassembly and reassembly. Professional gunsmith installation strongly recommended to ensure safe and reliable operation.\u003c\/p\u003e\u003cp\u003eMaintain reliable lever function in your Smith \u0026amp; Wesson pistol with this genuine factory lever spring.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":39556601479226,"sku":"","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC07490_535a01e0-d42a-4c86-a7f2-7a61141c8699.jpg?v=1689016394"},{"product_id":"204180000-smith-wesson-pistol-stirrup-models-4003tsw-4006tsw-4043tsw-4046tsw-5906tsw-1006-1026-1066-1076-1086-39-3904-3906-3944-3946-439-new-part","title":"204180000 S\u0026W Stirrup 1006, 1026, 1066, 1076, 1086, 39, 3904, 3906, 3944, 3946, 439","description":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003cp\u003eIntroducing the Smith \u0026amp; Wesson Pistol Stirrup, designed for a perfect fit on various models such as \u003cstrong\u003e4003TSW, 4006TSW, 4043TSW, 4046TSW, 5906TSW, 1006, 1026, 1066, 1076, 1086, 39, 3904, 3906, 3944, 3946, and 439\u003c\/strong\u003e. and more. This OEM factory new part is precision crafted to meet the highest standards of quality and compatibility. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eShoot us an email or give us a call for all you S\u0026amp;W part needs! \u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePart# 204180000\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003eWe only ship to addresses is the United States!!\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"text-align: center;\" helvetica=\"\" neue=\"\" arial=\"\" sans-serif=\"\" font-size:=\"\" text-align:=\"\" center=\"\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" helvetica=\"\" neue=\"\" arial=\"\" sans-serif=\"\" font-size:=\"\" text-align:=\"\" center=\"\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" helvetica=\"\" neue=\"\" arial=\"\" sans-serif=\"\" font-size:=\"\" text-align:=\"\" center=\"\"\u003e\u003cstrong\u003eGunsmiths Required: Disassembly and Assembly required to replace part\u003cbr\u003eSome parts may require installation and fitting by a qualified gun smith Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":39569362059322,"sku":"204180000","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC07881_f575965d-a92c-425c-9c21-853d5da0c7b6.jpg?v=1647363554"},{"product_id":"27516-wolff-for-smith-wesson-pistol-model-39-439-539-639-3904-3906-3944-3946-9mm","title":"Wolff Hammer Spring for S\u0026W Pistols - 16 LB | 39\/439\/539\/639\/3904\/3906\/3944\/3946 | 9mm | Part 27516","description":"\u003ch3\u003eWolff Hammer Spring for S\u0026amp;W Pistols\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 27516\u003c\/p\u003e\u003cp\u003ePremium Wolff 16 LB reduced power hammer spring designed for Smith \u0026amp; Wesson 9mm pistols and other centerfire models. This precision-engineered spring provides lighter hammer fall for a smoother trigger pull while maintaining reliable primer ignition.\u003c\/p\u003e\u003ch4\u003eCompatible Models:\u003c\/h4\u003e\u003cp\u003eThis hammer spring fits the following Smith \u0026amp; Wesson pistols:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9mm\u003c\/strong\u003e - Models 39*, 439, 539, 639, 3904, 3906, 3944, 3946, 59*, 459, 559, 659, 5903, 5904, 5906, 5923, 5924, 5926, 5943, 5944, 5946, 5967, 909, 910, 915\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.45 ACP\u003c\/strong\u003e - Models 645, 745, 4506, 4526, 4536**, 4546, 4566, 4567, 4576, 4586, 4596\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm\u003c\/strong\u003e - Models 1006, 1026, 1066**, 1076, 1086\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.40 S\u0026amp;W\u003c\/strong\u003e - Models 410, 411, 4003, 4004, 4006, 4026, 4043, 4044, 4046***\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003e*Early 39\/59 pistols had a 22 LB factory spring\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e**Some pistols may have short hammer springs\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e***Some 4046's have a 16 LB factory hammer spring\u003c\/em\u003e\u003c\/p\u003e\u003ch4\u003eImportant Note:\u003c\/h4\u003e\u003cp\u003eSmith \u0026amp; Wesson pistols use 2 different hammer springs (Long - Group A \u0026amp; Short - Group B) for most centerfire semi-automatic pistols. This is the \u003cstrong\u003eLong (Group A)\u003c\/strong\u003e hammer spring.\u003c\/p\u003e\u003ch4\u003eKey Features:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 LB Reduced Power:\u003c\/strong\u003e Lighter hammer fall for smoother trigger pull\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Fits most S\u0026amp;W 3rd gen autos in 9mm, 10mm, .40, and .45\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Quality:\u003c\/strong\u003e Made in USA by Wolff GunspringMakers with over 75 years of expertise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetition Ready:\u003c\/strong\u003e Popular choice for IDPA, USPSA, and action shooting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Ignition:\u003c\/strong\u003e Engineered to maintain positive primer strikes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Spring Type:\u003c\/strong\u003e Group A configuration for listed models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Type:\u003c\/strong\u003e Hammer Spring (Long - Group A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Weight:\u003c\/strong\u003e 16 LB (Reduced Power)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Calibers:\u003c\/strong\u003e 9mm, 10mm, .40 S\u0026amp;W, .45 ACP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Premium spring steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Corrosion-resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Wolff GunspringMakers (USA)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e 1 spring per pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eInstallation:\u003c\/h4\u003e\u003cp\u003eInstallation requires disassembly of your S\u0026amp;W pistol to access the hammer spring. If you're not comfortable performing this installation, have a qualified gunsmith install the spring. Always function test with your carry ammunition after installation to ensure reliable primer ignition.\u003c\/p\u003e\u003ch4\u003eWhy Choose Wolff Springs?\u003c\/h4\u003e\u003cp\u003eSince 1948, Wolff has been America's premier manufacturer of precision firearm springs. Their hammer springs are engineered to exacting tolerances, providing smooth, reliable performance for competition, carry, and range use. The 16 LB reduced power spring delivers improved trigger feel while maintaining reliable ignition.\u003c\/p\u003e\u003ch4\u003eFrequently Asked Questions:\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ: Will this affect reliability?\u003c\/strong\u003e\u003cbr\u003eA: When properly tested with your carry ammunition, the 16 LB spring maintains reliable ignition while improving trigger feel. Always function test thoroughly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this suitable for carry use?\u003c\/strong\u003e\u003cbr\u003eA: Yes, when properly tested with your carry ammunition to ensure reliable primer strikes. Many shooters prefer reduced power springs for both carry and competition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I know if I need the long or short spring?\u003c\/strong\u003e\u003cbr\u003eA: Most S\u0026amp;W 3rd gen pistols use the long spring (Group A). Check your current spring or consult a gunsmith if unsure.\u003c\/p\u003e\u003ch4\u003eWarranty \u0026amp; Returns:\u003c\/h4\u003e\u003cp\u003eWolff springs are backed by the manufacturer's quality guarantee against defects in materials and workmanship. All products are eligible for return within our standard return policy period if unused and in original condition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1 Wolff Hammer Spring (16 LB)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e This reduced power spring is ideal for improving trigger feel on your S\u0026amp;W pistol.\u003c\/p\u003e","brand":"Wolff Gunsprings","offers":[{"title":"Default Title","offer_id":39734592340026,"sku":"27516","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC03075.jpg?v=1664477638"},{"product_id":"sw-model-cs9c-cs9d-cs9s-39-3904-3914-3914dao-3944-3954-439-539-908-909-trigger-pin","title":"S\u0026W Trigger Pin 060310000 - Model 908, 909, 39, 439, 3904, 3914, CS9 Series","description":"\u003ch2\u003eSmith \u0026amp; Wesson Trigger Pin - Part# 060310000\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eFactory New OEM Part\u003c\/strong\u003e - Genuine Smith \u0026amp; Wesson trigger pin for reliable trigger assembly and function.\u003c\/p\u003e\u003ch3\u003eCompatible Models:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eModel 39, 439, 539\u003c\/li\u003e\n\u003cli\u003eModel 3904, 3914, 3914DAO\u003c\/li\u003e\n\u003cli\u003eModel 3944, 3954\u003c\/li\u003e\n\u003cli\u003eModel 908, 909\u003c\/li\u003e\n\u003cli\u003eCS9C, CS9D, CS9S\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis precision-manufactured trigger pin is a critical component that secures the trigger assembly in your pistol. Essential for maintaining proper trigger function and overall firearm reliability.\u003c\/p\u003e\u003ch3\u003eProduct Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFactory new condition\u003c\/li\u003e\n\u003cli\u003ePrecision-manufactured for exact fit\u003c\/li\u003e\n\u003cli\u003eOEM quality and specifications\u003c\/li\u003e\n\u003cli\u003eEnsures proper trigger assembly\u003c\/li\u003e\n\u003cli\u003eDirect replacement part\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 060310000\u003c\/li\u003e\n\u003cli\u003eCondition: Factory New\u003c\/li\u003e\n\u003cli\u003eManufacturer: Smith \u0026amp; Wesson\u003c\/li\u003e\n\u003cli\u003eWeight: 0.99 oz\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eProfessional gunsmith installation recommended for proper fitting and function. Contact us for expert assistance with all your Smith \u0026amp; Wesson parts needs.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":39746158952506,"sku":"060310000","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC01879_8d7439a5-2610-481b-b4a7-57018eb5b0aa.jpg?v=1665605188"}],"url":"https:\/\/usagunsandgear.com\/collections\/sw-model-439-pistol-parts-9mm-second-gen\/5904.oembed","provider":"USA Guns And Gear","version":"1.0","type":"link"}