Geissele Automatics MK4 Super Modular Rail Handguard 13.5 Inch M-LOK – Desert Tan (05-278S)

• Free float handguard designed for AR 15 platforms with extended modular accessory mounting
• 13.5 inch length with M LOK slots at 3 6 9 and upper 45 positions
• Includes proprietary 2.25 inch barrel nut for stable alignment and secure mounting
• Integrated short picatinny rail sections at front for mounting lights or accessories
• Maximum venting design reduces overall weight and improves thermal performance
• Desert Dirt Color finish may show natural shade variations from manufacturing process

The Geissele Automatics MK4 Super Modular Rail 13.5″ M-LOK Handguard Desert Tan is a handguard designed for mounting accessories on AR-15 platforms.

The Geissele Automatics MK4 Super Modular Rail 13.5″ M-LOK Handguard Desert Tan has a length of 13.5 inches, an outer diameter of 2.11 inches, and weighs 13.5 ounces with hardware. This product is used for attaching accessories using M-LOK slots and integrated Picatinny rail sections at the front positions. It includes a barrel nut, while the barrel nut wrench is sold separately. The rail uses a 2.25-inch barrel nut interface to increase contact with the receiver and maintain alignment. Venting is incorporated along the handguard to manage heat. In typical setups, this handguard supports modular accessory placement, and finish variations may occur due to the manufacturing process.