Daniel Defense MK18 RIS II Rail Interface System 9.55" AR-15 Free Float Hand Guard 6061-T6 Aluminum Hard Coat Anodized Finish Matte Black

Overview

The Daniel Defense MK18 RIS II (Rail Interface System) is a 9.55-inch free-float handguard designed for the AR-15 platform. Developed originally at the request of the United States Special Operations Command (SOCOM) for the SOPMOD II program, this rail features a two-piece design that allows the operator to mount an M203 grenade launcher without requiring additional parts or special tools, provided the lower rail section is removed. The system is built from aircraft-grade 6061-T6 aluminum with a Mil-Spec Type III hard coat anodized black finish. Key features include an uninterrupted upper Picatinny rail platform for mounting optics and accessories, and a robust 6-bolt bolt-up system that uses a steel barrel nut and Grade 8 military-specification fasteners to secure the handguard to the upper receiver. The rail has an overall width of 2.23 inches, a height of 2.25 inches, and an inside diameter of 1.15 inches. The unit weighs 14.1 ounces. Daniel Defense recommends using this handguard in conjunction with a MK12 low-profile gas block. Note that a specific bolt-up system barrel nut wrench is required for proper installation.

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