{"product_id":"geissele-automatics-super-modular-rail-mk4-free-float-m-lok-handguard-13-5in-black-05-278b","title":"Geissele Automatics Super Modular Rail MK4 Free-Float M-LOK Handguard 13.5in Black 05-278B","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe Geissele Automatics Super Modular Rail (SMR) MK4 M-LOK is an ultra-lightweight, free-float AR-15 handguard built for strength, rigidity, and modular accessory placement. Designed around Magpul M-LOK slots at the 3, 6, and 9 oclock positions (plus the upper 45-degree quadrants), it allows you to configure lights, grips, and other accessories exactly where you need them. Integrated short M1913 Picatinny rail sections at the fore end (3\/6\/9 oclock) add additional mounting flexibility, while extensive venting promotes heat dissipation without sacrificing the rails robust feel.\u003c\/p\u003e\n\u003cp\u003eThe MK4 uses Geisseles proprietary 2.25-inch long barrel nut to increase surface contact with the receiver for a straight, true interface that supports accuracy and repeatable zero after maintenance. Installation requires a Geissele barrel nut wrench (sold separately). Finished in black and built to demanding standards, the SMR MK4 is a versatile choice for hard-use AR builds.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFree-float Super Modular Rail (MK4) design enhances rigidity and supports consistent accuracy and repeatable zero\u003c\/li\u003e\n  \u003cli\u003eM-LOK accessory mounting at 3, 6, and 9 oclock plus upper 45-degree quadrants for highly modular setups\u003c\/li\u003e\n  \u003cli\u003eIntegrated short M1913 Picatinny rail sections at the fore (3\/6\/9 oclock) for secure accessory mounting\u003c\/li\u003e\n  \u003cli\u003eMaximum venting helps dissipate heat while keeping overall weight low\u003c\/li\u003e\n  \u003cli\u003eIncludes Geissele proprietary 2.25-inch long barrel nut (barrel nut wrench sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Geissele Automatics\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel\/Series:\u003c\/strong\u003e Super Modular Rail (SMR) MK4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type:\u003c\/strong\u003e M-LOK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandguard Type:\u003c\/strong\u003e Free-Float\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 13.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Rail Sections:\u003c\/strong\u003e Short M1913 Picatinny sections at fore in 3\/6\/9 oclock positions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 2.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 1.35 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 2.11 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight (with hardware):\u003c\/strong\u003e 13.5 oz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 6061-T6 Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Type III Hardcoat Anodized (Black)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Barrel nut (barrel nut wrench sold separately)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Platform:\u003c\/strong\u003e AR-15 (Mil-Spec M4 upper receivers)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 854014005717\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 05-278B\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.\u003c\/em\u003e\u003c\/p\u003e","brand":"Geissele Automatics","offers":[{"title":"Default Title","offer_id":44074615472250,"sku":"FLX-GEI05-278B","price":331.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/270734934.jpg?v=1766953257","url":"https:\/\/tlooutdoors.com\/products\/geissele-automatics-super-modular-rail-mk4-free-float-m-lok-handguard-13-5in-black-05-278b","provider":"TLO Outdoors","version":"1.0","type":"link"}