The Geissele Automatics Super Modular Rail MK14 (brand part no. 05-575S) is a 15-inch M-LOK free float handguard designed with a slimmer diameter and lower overall height than earlier Geissele rails, finished here in desert dirt aluminum. It includes the updated Geissele barrel nut, whose long 2.25-inch contact surface with the receiver keeps the rail straight and true along its full length. Machined from 7000 series aluminum and finished in durable Type-3 hardcoat anodizing, the MK14 uses M-LOK slots at the 3, 6, and 9 o’clock positions so shooters can mount lights, bipods, and other AR handguard accessories securely without adding unnecessary bulk.

Key Specifications

• Measures 15 inches in length for extended rail real estate on longer AR builds.
• Machined from 7000 series aluminum for a strong, rigid, and relatively light handguard.
• Finished in Type-3 hardcoat anodized desert dirt.
• Uses M-LOK slots at the 3, 6, and 9 o’clock positions for accessory mounting.
• Includes the updated Geissele barrel nut with a 2.25-inch contact surface for added rigidity.
• Designed with a slimmer diameter and lower profile than earlier Geissele rail designs.
• Compatible with the AR platform using standard barrel nut mounting.

Frequently Asked Questions

Does this handguard include a barrel nut? Yes, the updated Geissele barrel nut is included.

What material is the rail made from? It is machined from 7000 series aluminum and finished in Type-3 hardcoat anodizing.

What mounting slots does the rail use? M-LOK slots at the 3, 6, and 9 o’clock positions.

Buy the Geissele Super Modular Rail MK14 15-inch, Desert Dirt

Order this Geissele MK14 rail from our Lubbock, Texas gun shop, and it will ship as soon as it is ready to send.