Upgrading your AR Handguards & Forends lets you customize your weapon so that it performs, looks, and feels exactly how you want it to. One of the best upgrades you can make is by investing in a Geissele Super Modular Handguard Rail MK4. Featuring M-LOK attachment ports and integrated Picatinny rails at the fore end in the 3, 6, and 9 o'clock positions, you can put tons of attachments and optics on these handguards. Plus, it is designed with maximum venting in mind to reduce heat buildup and reduce the overall weight of the handguard, making maneuvering around tight areas easier and less cumbersome. The Super Modular Rail even has Geissele's proprietary 2.25-inch long barrel nut that increases surface contact between the rail and receiver. This creates a steady, durable platform that you can trust to stay straight and true through long periods of regular, heavy use. Grab the Geissele Super Modular Handguard Rail today to take your weapon to the next level. Specifications for Geissele Super Modular Handguard Rail MK4 M-LOK: Manufacturer: Geissele Color: Black Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Length: 9.3 in Gun Rail: Picatinny Weight: 9.3 oz Condition: New Additional Features: Proprietary 2.25in long barrel nut included Included Accessories: Standard Inner Diameter: 1.35 in Outer Diameter: 2.11 in Mount Type: M-LOK Country of Origin: USA Quantity: 1 Features of Geissele Super Modular Handguard Rail MK4 M-LOK: M-LOK and Picatinny Attachment Systems Free-Float Design Proprietary Barrel Nut Lightweight, Super Modular Design Package Contents: Geissele Super Modular Handguard Rail MK4 MLOK NOTE: IF THIS IS YOUR FIRST TIME PURCHASING A GEISSELE AUTOMATICS RAIL, YOU WILL NEED TO PURCHASE A BARREL NUT WRENCH IN ORDER TO PROPERLY INSTALL THE RAIL. The Geissele Super Modular Handguard Rail MLOK MK4 is a quality addition to the Geissele lineup. For more great deals on AR Handguards & Forends by Geissele, please browse our Geissele Gun Parts page.