Daniel Defense MFR XS

The Daniel Defense MFR (Modular Float Rail) XS represents the company's solution for shooters seeking the perfect balance of weight savings, mounting flexibility, and Daniel Defense's signature build quality. Machined from aircraft-grade 6061-T6 aluminum with Mil-Spec Type III hard coat anodizing, the MFR XS features Daniel Defense's patented bolt-up mounting system that uses grade 8 military specification fasteners and a steel barrel nut for rock-solid attachment to the upper receiver. The "XS" designation has been dropped from recent marketing, but it refers to the same system that has become a staple of Daniel Defense's product line.

The MFR features an uninterrupted Mil-Spec 1913 Picatinny upper rail running the full length of the handguard, with M-LOK attachment points at seven different positions for maximum mounting versatility. Ambidextrous sling swivel attachment points are integrated into the design, eliminating the need for aftermarket QD sockets. The 13.5-inch model weighs just 10.2 ounces, demonstrating Daniel Defense's ability to shed weight without compromising structural integrity. The MFR can be used with pinned low-profile gas blocks on pistol, carbine, mid-length, or rifle-length gas systems.

Real-world users appreciate the MFR's clean aesthetic and Daniel Defense quality, noting the precise fitment and premium feel that justifies the investment. The bolt-up system installs cleanly with the included tools and hardware, creating a secure interface that maintains zero through extended use. The 1.39-inch inside diameter accommodates most suppressor configurations while keeping the overall profile manageable. As Daniel Defense's factory handguard option, the MFR XS carries the same warranty and support that has made DD a trusted name in the AR-15 market.