{"product_id":"ether-3d-springfield-kuna-sxr-handguard","title":"Ether-3D Springfield KUNA SXR Handguard","description":"\u003ch2 dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eProduct Overview\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eEther-3D KUNA SXR Handguard\u003c\/strong\u003e is a newly designed extended handguard for the \u003cstrong\u003eSpringfield KUNA\u003c\/strong\u003e, providing additional forward handguard length and accessory mounting space while maintaining a lightweight, integrated profile.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe SXR’s overall styling was \u003cstrong\u003einspired by the distinctive profile of the Geissele Automatics MK4 Super Modular Rail\u003c\/strong\u003e, while being independently designed by Ether-3D specifically for the Springfield KUNA platform. The SXR is \u003cstrong\u003enot a reproduction or replica of the MK4\u003c\/strong\u003e and incorporates its own dimensions, mounting system, construction, and features tailored specifically to the KUNA.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAt approximately \u003cstrong\u003e7.25 inches in overall length\u003c\/strong\u003e, the SXR extends approximately \u003cstrong\u003e3.5 inches beyond the factory receiver\u003c\/strong\u003e, providing additional support-hand space and usable rail length while maintaining a compact overall profile.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe design features a continuous \u003cstrong\u003eMIL-STD-1913 Picatinny top rail\u003c\/strong\u003e along with integrated \u003cstrong\u003eM-LOK mounting slots\u003c\/strong\u003e on both sides and the bottom for compatible accessories.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eManufactured from \u003cstrong\u003ecarbon-fiber reinforced polymer\u003c\/strong\u003e, the handguard combines lightweight construction with rigidity and reduced heat transfer compared with traditional metal handguards. Each SXR handguard is precision 3D printed in the USA with a clean carbon-fiber appearance.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApproximately \u003cstrong\u003e7.25-inch overall length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtends approximately \u003cstrong\u003e3.5 inches beyond the factory receiver\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSXR modular rail design\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eStyling inspired by the \u003cstrong\u003eGeissele Automatics MK4 Super Modular Rail\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIndependently designed by \u003cstrong\u003eEther-3D specifically for the Springfield KUNA\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eContinuous \u003cstrong\u003eMIL-STD-1913 Picatinny top rail\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIntegrated \u003cstrong\u003eM-LOK slots\u003c\/strong\u003e on both sides and bottom\u003c\/li\u003e\n\u003cli\u003eCompatible with the \u003cstrong\u003efactory front sight\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDesigned to accommodate suppressors up to approximately \u003cstrong\u003e1.65 inches in diameter\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003ecarbon-fiber reinforced polymer construction\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReduced heat transfer compared with traditional metal handguards\u003c\/li\u003e\n\u003cli\u003eNo cutting, drilling, or permanent firearm modifications required\u003c\/li\u003e\n\u003cli\u003ePrecision 3D printed in the \u003cstrong\u003eUSA\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"auto\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv dir=\"auto\" class=\"group TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable dir=\"auto\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEther-3D KUNA SXR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber Reinforced Polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSpringfield KUNA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 7.25 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExtension Beyond Receiver\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 3.5 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 3.1 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 2.2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.95oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTop Rail\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMIL-STD-1913 Picatinny\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccessory Mounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM-LOK – Sides \u0026amp; Bottom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax. Suppressor Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 1.65 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturing Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdditive Manufacturing \/ 3D Printed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEther-3D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Manufacture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 dir=\"auto\"\u003eCompatibility\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eDesigned specifically for the \u003cstrong\u003eSpringfield KUNA\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe SXR incorporates a continuous \u003cstrong\u003eMIL-STD-1913 Picatinny top rail\u003c\/strong\u003e that aligns with the factory rail while maintaining compatibility with the factory front sight.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eIntegrated \u003cstrong\u003eM-LOK slots\u003c\/strong\u003e are located on both sides and the bottom of the handguard for mounting compatible accessories.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe internal dimensions are designed to accommodate compatible suppressors measuring up to approximately \u003cstrong\u003e1.65 inches in diameter\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eDepending on suppressor diameter and accessory placement, \u003cstrong\u003eshorter M-LOK screws may be required\u003c\/strong\u003e to maintain proper internal clearance.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAlways verify adequate clearance between the suppressor, M-LOK hardware, and inside of the handguard before use.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × \u003cstrong\u003eEther-3D KUNA SXR Handguard\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eMounting hardware, firearm, suppressor, optics, lights, and other accessories shown in product photos are not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=yRhUB5V1kmk\" rel=\"noopener\" target=\"_blank\"\u003e\u003cb\u003eInstallation video!\u003c\/b\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eImportant Information\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eEach handguard is individually produced using \u003cstrong\u003ecarbon-fiber reinforced polymer\u003c\/strong\u003e and additive manufacturing. Minor variations in surface texture or layer appearance are normal characteristics of the manufacturing process and do not necessarily indicate a defect.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eM-LOK Torque\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eMaximum recommended torque: 11–13 in-lbs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eDo not exceed the recommended torque when installing M-LOK accessories. Excessive torque can permanently damage polymer M-LOK mounting slots.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eUse a torque wrench whenever possible and verify that all M-LOK T-nuts rotate completely into the locked position before tightening.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSuppressor \u0026amp; Heat Safety\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eThis handguard should only be used with a compatible suppressor or approved muzzle extension that extends beyond the front of the handguard.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eDo not fire with the muzzle terminating inside the handguard.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eBefore use, verify adequate clearance between the suppressor and the inside of the handguard and ensure M-LOK screws or other accessory hardware do not contact the suppressor.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eCarbon-fiber reinforced polymer provides reduced heat transfer compared with metal; however, it remains a polymer component. Repeated rapid fire, prolonged firing without adequate cooling, or other unusually aggressive firing schedules can generate temperatures beyond the material's intended operating range.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAllow the suppressor and handguard to cool periodically during extended use.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe heat deflection temperature (HDT) of PETG is typically between \u003cstrong\u003e65°C and 75°C (149°F to 167°F).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003ePA6-CF (carbon fiber-reinforced nylon 6) has a heat deflection temperature ranging from approximately \u003cstrong\u003e173°C to 196°C (343.4°F to 384.8°F)\u003c\/strong\u003e at high load.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAlways verify proper installation, fitment, clearance, and secure attachment before use.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eDesign Inspiration \u0026amp; Trademark Notice\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eEther-3D KUNA SXR Handguard\u003c\/strong\u003e was independently designed by Ether-3D specifically for the Springfield KUNA. Its overall styling was inspired by the \u003cstrong\u003eGeissele Automatics MK4 Super Modular Rail\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe KUNA SXR is \u003cstrong\u003enot a reproduction or replica of the Geissele MK4\u003c\/strong\u003e and features its own dimensions, construction, mounting arrangement, and KUNA-specific design.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eEther-3D is not affiliated with, endorsed by, or sponsored by Geissele Automatics or Springfield Armory. Geissele, MK4, Springfield Armory, and KUNA are trademarks of their respective owners.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eManufactured by \u003cstrong\u003eEther-3D in Southern Indiana, USA.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePrecision • Performance • Printed\u003c\/strong\u003e\u003c\/p\u003e","brand":"Ether-3D","offers":[{"title":"PETG-CF","offer_id":54118259786035,"sku":"KUNA-HG-SXR-BLK","price":39.88,"currency_code":"USD","in_stock":true},{"title":"PA6-CF","offer_id":54118259818803,"sku":"KUNA-HG-SXR-BLK-2","price":55.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/9731\/2819\/files\/ChatGPT_Image_Sep_21_2026_11_45_19_AM.png?v=1790005540","url":"https:\/\/ether-3d.com\/products\/ether-3d-springfield-kuna-sxr-handguard","provider":"Ether-3D","version":"1.0","type":"link"}