Geissele Super Modular Rail M-LOK MK14 13.5in DDC. 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 Country of Origin: USA 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 05-573S: Super Modular Rail M-LOK MK14 13.5in DDC