--- title: "Geissele Automatics MK4 M-LOK Rail 10.5\"" description: "10.5\" free float AR-15 hand guard with full-length Picatinny top rail and M-LOK slots. 6061-T6 aluminum with Type 3 hard coat anodized finish." canonical_url: "https://www.kygunco.com/product/geissele-mk4-super-modular-rail-10.5-m-lok-desert-dirt" meta: author: KYGUNCO "og:description": "10.5\" free float AR-15 hand guard with full-length Picatinny top rail and M-LOK slots. 6061-T6 aluminum with Type 3 hard coat anodized finish." "og:image": "https://cdn.kygunco.com/assets/products/256265/thumbnail.jpg?v=1718630546" "og:image:height": "500" "og:image:width": "500" "og:title": "Geissele Automatics MK4 M-LOK Rail 10.5\"" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Gun Parts](https://www.kygunco.com/category/shooting/gun-parts) / [Handgun & Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts) / [Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts) / [Stocks & Recoil Pads](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts/stocks-and-recoil-pads) / GSS-05-1656S ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/256265/main.jpg?v=1718630546) For illustration purposes only, this image may not be an exact representation of the product. # GEISSELE MK4 Super Modular Rail 10.5" M-LOK Desert Dirt 10.5" free float AR-15 hand guard with a full-length top Picatinny rail, abbreviated Picatinny sections at 3, 6, and 9 o'clock, and M-LOK slots in matching positions plus the upper 45 quadrants. Made from 6061-T6 aluminum with a Type 3 hard coat anodized finish. Proprietary barrel nut requires a separate Geissele wrench. See Price In Cart ** 5 interest-free payments of **$57.72** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Fulfilled by a partner warehouse. ** Partner Fulfilled Almost gone. Order now before it sells out. Item # 256265 Style GSS-05-1656S UPC 810081130080 Condition New Manufacturer [Geissele Automatics](https://www.kygunco.com/brand/geissele) Weight 1 lb The Geissele Automatics Super Modular Rail (SMR) MK4 is an incredible durable AR-15 free float hand guard with some unique features. You will notice a full length m1913 picatinny rail runs the entirety of the top of the hand guard while small picatinny rail sections sit on the front of the hand guard at the 3, 6, and 9 O' Clock positions. Further increasing the modularity of this rail is the use of M-LOK slots in the same orientation as the small picatinny rail sections, and again full length M-LOK slots located on the upper 45 quadrants. The rail is made from 6061-T6 aluminum with a hard coat anodized finish. The proprietary barrel nut can only be installed with a Geissele barrel nut wrench which is sold separately. - Geissele Automatics 05-1656B - Super Modular Rails MK4 M-LOK - 10.5" Free Float Hand Guard - Full Length Top Picatinny 1913 Rail - Abbreviated Picatinny 1913 Rail Sections at 3,6, and 9 O' Clock - M-LOK Sections at 3,6 and 9 O' Clock and Upper 45 Quadrants - Proprietary Barrel Nut (Requires Separate Purchase of Barrel Nut Wrench 02-243F) - Height 2.4" - Inner Diameter 1.35" - Outer Diameter 2.11" - Overall Weight 10.6oz (12.74 with Barrel Nut) - 6061-T6 Aluminum - Type 3 Hard Coat Anodized Shop with KYGUNCO for the best selection, competitive pricing, and exceptional customer service. Experience the difference that comes with buying from a trusted outdoor retailer with over 20 years of experience in the industry. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from Geissele Automatics ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/geissele-mk4-super-modular-rail-10.5-m-lok-desert-dirt#webpage","@type":"WebPage","description":"10.5\" free float AR-15 hand guard with full-length Picatinny top rail and M-LOK slots. 6061-T6 aluminum with Type 3 hard coat anodized finish.","name":"Geissele Automatics MK4 M-LOK Rail 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