Geissele Automatics MK4 05-1656S, Super Modular Rail, Handguard, 10.5 in, M-LOK

Overview

The Geissele Automatics MK4 Super Modular Rail is a 10.5-inch free-float handguard designed for the AR-15 platform. Constructed from 7000-series aluminum, it features a Desert Dirt Color (DDC) Type III hardcoat anodized finish. The rail includes M-LOK slots at the 3, 6, and 9 o'clock positions as well as the upper 45-degree quadrants, with integrated Picatinny rail sections at the front of the 3, 6, and 9 o'clock positions. This handguard utilizes a proprietary 2.25-inch barrel nut to increase surface contact with the receiver, enhancing rigidity and zero repeatability. It weighs 10.6 ounces without the barrel nut (12.74 ounces installed) and has an inner diameter of 1.35 inches. Note that the DDC finish is intended to break up the rifle's outline and colors may vary between production batches.

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