Geissele Automatics MK4 Super Modular Rail Handguard 15 Inch M-LOK – Desert Tan (05-315S)

• Free float handguard designed for AR 15 rifles with modular accessory mounting
• 15 inch length with M LOK slots at 3 6 9 and upper 45 degree positions
• Includes proprietary 2.25 inch barrel nut for secure installation and alignment
• Integrated forward picatinny rail sections allow mounting of optics or other accessories
• Maximum venting reduces weight and improves heat dissipation performance
• Desert Dirt Color finish may show natural shade variations from manufacturing process

The Geissele Automatics MK4 Super Modular Rail Handguard 15″ Desert Dirt Color is a rail handguard designed for mounting accessories on AR-15 platform rifles. This Geissele Automatics MK4 Super Modular Rail Handguard 15″ Desert Dirt Color uses an M-LOK interface with a full-length Picatinny top rail and a 15-inch length. It includes a proprietary 2.25-inch barrel nut system for installation.

The Geissele Automatics MK4 Super Modular Rail Handguard 15″ Desert Dirt Color is built as a modular rail system with M-LOK attachment points at the 3, 6, and 9 o’clock positions and additional forward-mounted Picatinny sections. It features venting in the lower 45-degree quadrants and requires a barrel nut wrench sold separately. This product is used for mounting optics, lights, and accessories on rifle platforms. In typical setups, the rail provides multiple attachment positions and a continuous top rail for alignment. The MK4 handguard includes a Desert Dirt Color finish with natural shade variation and is categorized under handguards and forends for rifle configurations.