The Aero Precision M4E1-T Complete Upper is chambered in 5.56 NATO and features a 16-inch barrel with mid-length gas system.
- Caliber: 5.56 NATO / .223 Wylde
- Type: Complete Upper Receiver
- Compatible Lower: Standard AR-15
- Barrel Length: 16 inches
- Material: Forged 7075-T6 aluminum receiver, 4150 CMV barrel
- Finish: Flat Dark Earth Cerakote
- Includes: M4E1 threaded upper, 16″ barrel, ATLAS S-ONE handguard, charging handle, forward assist
- Installation: Attaches to mil-spec AR-15 lower with takedown pins; BCG and muzzle device required
