{"product_id":"geissele-automatics-super-modular-rail-mk4-15in-m-lok-free-float-handguard-black-05-315b","title":"Geissele Automatics Super Modular Rail MK4 15in M-LOK Free-Float Handguard, Black 05-315B","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe Geissele Super Modular Rail (SMR) MK4 M-LOK is an ultra-lightweight, free-float AR-15 handguard built to deliver a strong, rigid mounting platform with excellent heat management. Purpose-built with maximum venting for heat dissipation, the MK4 maintains durability while reducing overall weight. It features Magpul M-LOK attachment points at the 3, 6, and 9 o’clock positions as well as the upper 45° quadrants, plus integrated short M1913 Picatinny rail sections at the fore end in the 3, 6, and 9 o’clock positions for versatile accessory mounting.\u003c\/p\u003e\n\u003cp\u003eThe MK4 includes Geissele’s proprietary 2.25-inch long barrel nut, designed to increase surface contact at the receiver interface to help keep the rail straight and true across the full length. This design supports accuracy and zero repeatability during disassembly and reassembly for maintenance. Installation requires a Geissele barrel nut wrench (sold separately).\u003c\/p\u003e\n\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUltra-lightweight Super Modular Rail MK4 free-float design for AR-15 platforms\u003c\/li\u003e\n  \u003cli\u003eM-LOK slots at 3\/6\/9 o’clock and upper 45° quadrants for modular accessory placement\u003c\/li\u003e\n  \u003cli\u003eIntegrated short M1913 Picatinny rail sections at the fore end (3\/6\/9 o’clock positions)\u003c\/li\u003e\n  \u003cli\u003eMaximum venting promotes heat dissipation while helping reduce overall rail weight\u003c\/li\u003e\n  \u003cli\u003eIncludes Geissele proprietary 2.25-inch barrel nut for a straight, rigid interface (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\u003eProduct:\u003c\/strong\u003e Super Modular Rail (SMR) MK4 M-LOK Handguard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 15 in\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 15.1 oz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Nut:\u003c\/strong\u003e Proprietary 2.25 in barrel nut (included)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation Note:\u003c\/strong\u003e Requires Geissele barrel nut wrench (sold separately)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 854014005731\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 05-315B\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 product’s manufacturer.\u003c\/em\u003e\u003c\/p\u003e","brand":"Geissele Automatics","offers":[{"title":"Default Title","offer_id":44074494656634,"sku":"FLX-GEI05-315B","price":352.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/270734878.jpg?v=1766950225","url":"https:\/\/tlooutdoors.com\/products\/geissele-automatics-super-modular-rail-mk4-15in-m-lok-free-float-handguard-black-05-315b","provider":"TLO Outdoors","version":"1.0","type":"link"}