The Daniel Defense M4A1 FSP RIS II Handguard (brand part no. 01-004-08030-006) is a 12.25-inch, two-piece free-floating handguard that Daniel Defense originally designed at the request of United States Special Operations Command for the SOPMOD II program. Its key advantage is letting the individual operator free-float an M203 grenade launcher without needing additional parts, a capability built directly into the RIS II’s design. This M4A1 FSP version features a cutout in the top rail specifically to accommodate a standard front sight base on a carbine-length gas system, making it a direct fit for rifles running that configuration. Daniel Defense machines the handguard from 6061-T6 aluminum, and finishes it with a black anodized coating for durability. A Picatinny rail runs along its length for mounting optics and accessories, and the RIS II brings genuine special operations engineering to a civilian AR-15 build. It’s built for shooters who want the exact free-float handguard platform developed for one of the most demanding military special operations programs.

Key Specifications

• Measures 12.25 inches in length.
• Built as a two-piece, free-floating handguard design.
• Machined from 6061-T6 aluminum.
• Finished with a black anodized coating.
• Features a Picatinny rail along its length.
• Includes a cutout for a standard front sight base on a carbine-length gas system.
• Originally developed for the SOCOM SOPMOD II program.
• Free-floats an M203 grenade launcher without requiring additional parts.
• Weighs approximately 1.5 pounds.

Frequently Asked Questions

What makes this different from a standard free-float handguard? Daniel Defense designed the RIS II specifically to free-float an M203 grenade launcher without additional parts, a feature most standard handguards don’t include.

Does this handguard work with a fixed front sight base? Yes, it includes a cutout in the top rail specifically for a standard front sight base on a carbine-length gas system.

What’s the RIS II’s military background? Daniel Defense built the RIS II at the request of United States Special Operations Command for the SOPMOD II program.

Buy the Daniel Defense M4A1 FSP RIS II Handguard, 12.25-inch, Black

Bring genuine special operations engineering to your AR-15 build. Order it through our Daniel Defense lineup of AR handguards from our Lubbock, Texas gun shop.