Daniel Defense MK18 Upper Receiver Assembly 5.56mm RIS II FDE – Factory Complete

The Daniel Defense MK18 Upper Receiver Assembly is a factory-built complete upper chambered in 5.56mm NATO, featuring the authentic RIS II (Rail Interface System II) handguard in Flat Dark Earth.

• Type: Complete AR-15 Upper Receiver Assembly
• Caliber: 5.56mm NATO
• Barrel Length: 10.3 inches
• Barrel Profile: Cold hammer forged, chrome-lined
• Gas System: Mid-length, pinned low-profile gas block
• Handguard: Daniel Defense RIS II, Flat Dark Earth
• Rail: MIL-STD-1913 Picatinny
• Finish: Flat Dark Earth
• Receiver Material: Forged 7075-T6 aluminum
• Compatibility: MIL-SPEC AR-15 lower receivers
• NFA Notice: Attaching this upper to a rifle lower creates an SBR requiring ATF Form 1 or Form 4 approval