Daniel Defense RIS II M4A1 FSP Assembly FDE – Free-Float Rail System

The Daniel Defense RIS II M4A1 FSP Assembly in Flat Dark Earth is a drop-in free-float rail system designed for carbine-length AR-15 platforms with a front sight post configuration. This quad-rail handguard delivers continuous Picatinny rail coverage across all four sides, providing versatile mounting options for lights, lasers, grips, and other mission-critical accessories while maintaining the structural rigidity required for maintaining zero on mounted optics and devices.

Machined from 6061-T6 aluminum with a Type III hard-coat anodized finish in FDE, this rail system installs without permanent modification to the barrel or gas system. The kit includes the RIS II rail, barrel nut, all necessary mounting hardware, and installation instructions. Compatible with standard carbine-length gas systems and A2 front sight posts.

• Type: Free-float quad rail handguard
• Compatibility: AR-15 carbine-length with front sight post
• Material: 6061-T6 aluminum, Type III hard-coat anodized
• Finish: Flat Dark Earth (FDE)
• Rail Standard: MIL-STD-1913 Picatinny on all four sides
• Includes: RIS II rail, barrel nut, mounting hardware, instructions
• Use: Tactical, duty, home defense, competition shooting