The Geissele MK14 Super Modular Rail is a 10.5-inch M-LOK handguard engineered to enhance stability and functionality for modern rifle builds. This AR-15 free-float rail configuration prevents barrel contact, preserving accuracy and consistency under sustained use, and is precision-machined from aluminum to balance strength with manageable weight.
As the latest addition to Geissele’s Super Modular Rail lineup, the MK14 introduces a refined handguard design with reduced diameter and overall height for a slimmer profile. The rail ships with an updated Geissele Barrel Nut featuring superior rigidity—its 2.25″ long surface contact with the receiver establishes a platform engineered to remain straight and true across the entire length of the free-float rail.
M-LOK attachment points at the 3, 6, and 9 o’clock positions enable users to securely mount lights, bipods, and other firearm accessories with full customization. Machined from 6061-T6 Aluminum and finished in Type 3 Hardcoat Anodized DDC, the rail measures 2.02″ in height, weighs 8.7oz (11oz with barrel nut), and features a 1.52″ outer diameter and 1.27″ inner diameter.
