{"product_id":"geissele-13-5-mk8-m-lok-free-float-handguard-rail","title":"Geissele - 13.5\" MK8 M-LOK Free Float Handguard Rail","description":"\u003cp\u003e\u003cb\u003eBuilt for strength, modularity, and precision\u003c\/b\u003e, the Geissele Automatics 13.5\" Super Modular Rail MK8 M-LOK is a premium free float handguard engineered for demanding tactical, duty, and preparedness applications. Designed around Magpul’s proven M-LOK system, this rail delivers unmatched customization while maintaining exceptional rigidity and lightweight performance.\u003c\/p\u003e\n\n\u003cp\u003eThe MK8 features extensive venting at the lower 45° quadrants to enhance heat dissipation during sustained fire, while reducing overall weight. With M-LOK slots at the 3, 6, 9 o’clock positions and additional 45° mounting surfaces, this rail gives you complete flexibility to mount lights, grips, bipods, and other mission-critical accessories.\u003c\/p\u003e\n\n\u003cp\u003eAt the core of its performance is Geissele’s proprietary 2.25\" barrel nut system, providing increased surface contact with the upper receiver. This results in superior alignment, enhanced accuracy, and reliable zero retention—even after disassembly and reinstallation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eIdeal for AR-15 builds focused on reliability, modularity, and field performance\u003c\/b\u003e, the MK8 is trusted by professionals and serious shooters who demand gear that performs under pressure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFree float M-LOK handguard for AR-15 platforms\u003c\/li\u003e\n\u003cli\u003eExtensive modular mounting at 3, 6, 9 o’clock and 45° positions\u003c\/li\u003e\n\u003cli\u003eEnhanced heat dissipation with aggressive venting design\u003c\/li\u003e\n\u003cli\u003eRigid 7000 series aluminum construction for durability\u003c\/li\u003e\n\u003cli\u003eType III hardcoat anodized finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eProprietary 2.25\" barrel nut for improved alignment and accuracy\u003c\/li\u003e\n\u003cli\u003eLightweight design optimized for tactical and duty use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLength: 13.5\"\u003c\/li\u003e\n\u003cli\u003eHeight: 2.3\"\u003c\/li\u003e\n\u003cli\u003eInner Diameter: 1.35\"\u003c\/li\u003e\n\u003cli\u003eOuter Diameter: 2.11\"\u003c\/li\u003e\n\u003cli\u003eWeight: 10.8 oz (13.1 oz with barrel nut)\u003c\/li\u003e\n\u003cli\u003eMaterial: 7000 Series Aluminum\u003c\/li\u003e\n\u003cli\u003eFinish: Type-3 Hardcoat Anodized\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eImportant Notes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with Mil-Spec M4 upper receivers (billet compatibility not guaranteed)\u003c\/li\u003e\n\u003cli\u003eBarrel nut wrench required for installation — \u003ca href=\"https:\/\/mountainready.online\/collections\/whats-new\/products\/geissele-barrel-nut-wrench\"\u003eshop the Geissele Barrel Nut Wrench here\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003ePerfect for tactical rifle builds, survival loadouts, and duty-ready AR platforms\u003c\/b\u003e, this rail delivers the strength and adaptability you need when reliability matters most.\u003c\/p\u003e","brand":"Geissele Automatics","offers":[{"title":"Desert Dirt","offer_id":43172277911641,"sku":"RSR-GEI05-285S","price":401.95,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43172277944409,"sku":"RSR-GEI05-285B","price":375.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/9860\/2329\/files\/GEI05-285S_2_HR.jpg?v=1774304630","url":"https:\/\/mountainready.online\/products\/geissele-13-5-mk8-m-lok-free-float-handguard-rail","provider":"mountainready.online","version":"1.0","type":"link"}