The Geissele Super Modular Rail MK16 in 13.5 inches with M-LOK, finished in Desert Dirt Color (brand part no. 05-650S), is a rigid, easy-to-maintain AR-15 handguard built for hard use. Geissele Automatics uses an anti-rotation mounting design with a secure barrel-nut interface, and it adds M-LOK slots on every quadrant plus an M1913 Picatinny rail on top. The rail is machined from 7000 series aluminum and finished in Type-3 hardcoat anodizing. At 13.5 inches, it gives a modern AR-15 build room for optics and front accessories.

Key Specifications

• The length is 13.5 inches, long enough for modern AR-15 builds with front accessories.
• The accessory interface is M-LOK slots on every quadrant, for flexible placement.
• The top rail is an M1913 Picatinny, for direct-fit accessory mounting.
• The material is 7000 series aluminum, for rigidity with light carry weight.
• The finish is Type-3 hardcoat anodized in Desert Dirt Color, for corrosion and wear resistance.
• The mounting is anti-rotation tabs and set screws on a barrel-nut interface, which help prevent rail movement under hard use.
• The style is free float, so the handguard does not touch the barrel.

Frequently Asked Questions

Does it have M-LOK slots all the way around? Yes. The MK16 has M-LOK slots on every quadrant, and an M1913 Picatinny rail on top.

What is the finish? It is Type-3 hardcoat anodized aluminum, and this version is Desert Dirt Color.

Is it free float? Yes. It is a free float handguard that mounts at the barrel nut with anti-rotation tabs and set screws.

Buy the Geissele Super Modular Rail MK16, 13.5-Inch M-LOK, DDC

A rigid, free float rail changes how an AR-15 shoots and carries, and the MK16 is Geissele’s long M-LOK option. Order it from our Lubbock, Texas gun shop for fast shipping, and see more AR handguards while you are here.