The Geissele 14.5" HK Super Modular Rail Black Handguard Assembly is a heavy-duty tactical rail designed specifically to replace the standard handguard on HK 416 and MR556 platform rifles. Built from precision-machined 6061-T6 aluminum and finished in Type III hardcoat black anodize for durability, the 14.5 inch Super Modular Rail incorporates strength, rigidity, and modularity while retaining compatibility with the standard HK barrel nut. It features mounting points at the 3, 6, and 9 o’clock positions using steel inserts for rock-solid accessory attachment, though accessory rail sections are sold separately. With an inner diameter of 1.35 in and an outer diameter of 1.9 in, this rail provides a rugged platform for tactical builds that demand reliability and adaptability. Geissele 14.5" HK Black Super Modular Rail 05-191B