--- title: "Geissele Automatics MK4 10.5\" M-LOK Handguard Black" description: "Black 10.5\" free-float AR-15 handguard with a full-length top Picatinny rail, M-LOK slots, 6061-T6 aluminum, and Type 3 hardcoat anodizing." canonical_url: "https://www.kygunco.com/product/geissele-mk4-super-modular-rail-10.5-m-lok-black" meta: author: KYGUNCO "og:description": "Black 10.5\" free-float AR-15 handguard with a full-length top Picatinny rail, M-LOK slots, 6061-T6 aluminum, and Type 3 hardcoat anodizing." "og:image": "https://cdn.kygunco.com/assets/products/256264/thumbnail.jpg?v=1718630546" "og:image:height": "500" "og:image:width": "500" "og:title": "Geissele Automatics MK4 10.5\" M-LOK Handguard Black" --- > 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-05-1656B ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/256264/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 Black The Geissele Automatics Super Modular Rail MK4 is a 10.5" free-float AR-15 handguard in black Type 3 hardcoat-anodized 6061-T6 aluminum. It features a full-length top M1913 Picatinny rail, shorter rail sections at the 3, 6, and 9 o'clock positions, and M-LOK slots along the sides and upper 45-degree quadrants. Its proprietary barrel nut requires a separately sold Geissele wrench. See Price In Cart ** 5 interest-free payments of **$54.80** 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 Handled by our expert shippers in Bardstown, KY. Item # 256264 Style GSS-05-1656B UPC 810081130097 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 - Black 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-black#webpage","@type":"WebPage","description":"Black 10.5\" free-float AR-15 handguard with a full-length top Picatinny rail, M-LOK slots, 6061-T6 aluminum, and Type 3 hardcoat anodizing.","name":"Geissele Automatics MK4 10.5\" M-LOK Handguard 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