Geissele 05-573S 13.5" M-LOK MK14 DDC Super Modular RailGeissele’s Super Modular M-LOK MK14 Super Modular Rail is an ideal addition to any AR15 build. It features a reduced diameter and overall height to produce a slimmer package. The MK14 Super Modular Rail utilizes an optimized version of Geissele’s proven Barrel Nut Design, which makes installation simple and enhances rigidity. Other features of the MK14 Super Modular Rail include multiple M-LOK attachment points in the 3, 6, and 9 o’clock positions for end user customization. Features of the Super Modular M-LOK MK14 Super Modular Rail: Slim profileOptimized Barrel Nut Design for easy installation and greater rigidityMultiple M-LOK attachment points in the 3, 6, and 9 o’clock positionsAvailable in 9.3”, 10.5”, 13.5”, and 15” lengths Geissele 13.5" M-LOK MK14 DDC Super Modular Rail 05-573S