Geissele Super Modular Rail M-LOK MK14 15in Black. 3" Super Modular AR Handguards & Forends is an updated version of the proven Geissele Barrel Nut design providing ease of installation and superior rigidity. Utilizing Magpul's M-LOK technology in the 3 6 and 9 o'clock positions allows the end user full customization and modularity of their rifle to securely mount lights bipods and other firearm accessories. Specifications for Geissele Mk14 M-Lok Super Modular Rail: Manufacturer: Geissele Finish: Type 3 Hard Coat Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Condition: New Inner Diameter: 1.27 in Outer Diameter: 1.52 in Height: 2.02 in Mount Type: M-LOK Country of Origin: USA Quantity: 1 Package Contents: Geissele MLOK MK14 9.3 Inch Super Modular Rail 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. Geissele 05-575B: Super Modular Rail M-LOK MK14 15in Black