The Daniel Defense RIS II M4A1 Assembly is a drop-in, free-floating rail system engineered to military specifications for carbine-length AR-15 and M4-pattern rifles.
- Type: Free-Floating Quad Rail Handguard
- Compatible Firearms: M4/AR-15 carbine-length gas systems
- Material: 6061-T6 aluminum, hard-anodized black finish
- Rail Interface: MIL-STD-1913 Picatinny on all four sides
- Includes: Mounting hardware, installation instructions
- Use: Direct replacement for standard M4 carbine handguards
