The Geissele MK14 Super Modular Rail (SMR) is a 13.5-inch free-float handguard designed for AR-15 style platforms. It is precision machined from 6061-T6 aluminum to deliver a rigid, lightweight mounting surface while reducing overall diameter and profile. Magpul’s M-LOK interface at the 3, 6 and 9 o’clock positions allows secure attachment of lights, bipods and other accessories. The MK14 ships with an updated Geissele barrel nut designed for long surface contact and improved rigidity; a Geissele barrel nut wrench is required for installation (sold separately).
Key Specifications
- The overall length is 13.5 inches for extended rail coverage.
- Construction is 6061-T6 aluminum for a balance of strength and weight savings.
- Finish is Type III Hardcoat Anodized for durable corrosion and wear resistance.
- Accessory interface uses M-LOK slots at the 3, 6, and 9 o’clock positions.
- Includes an updated Geissele barrel nut design to increase contact area and rigidity.
- Color is listed as Desert Tan (DDC) for muted, low-visibility appearance.
- Designed for AR-15 style platforms and mounting compatibility.
- Product type is a handguard intended for free-float installation.
Built for shooters who prioritize a slim profile, modularity, and a solid mounting platform, the MK14 SMR combines proven materials and modern interface standards to support a variety of accessory configurations. Its durable finish and reinforced barrel nut design make it a practical choice for upgrading an AR-15 style rifle with a lightweight, customizable free-float rail.
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