The Daniel Defense M4A1 Upper Receiver delivers a factory-assembled 5.56 NATO configuration with a 14.5-inch cold hammer-forged barrel, pinned and welded muzzle device to meet the 16-inch legal requirement.
- Caliber: 5.56 NATO
- Type: Complete Upper Receiver Assembly
- Compatible Lower: Mil-Spec AR-15
- Barrel Length: 14.5″ (pinned/welded to 16″)
- Twist Rate: 1:7
- Material: 7075-T6 Aluminum Upper, Cold Hammer-Forged Barrel
- Finish: Mil-Spec+ FDE Cerakote
- Includes: BCG, Charging Handle, RIS II M-LOK Handguard
- Installation: Drop-in, No Gunsmithing Required
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