The Aero Precision M4E1-T complete upper assembly delivers a mil-spec 5.56 NATO configuration in a 16-inch mid-length gas system, compatible with standard AR-15 lower receivers.
- Caliber: 5.56 NATO / .223 Remington
- Type: Complete upper assembly
- Compatible Lower: Mil-spec AR-15
- Barrel Length: 16 inches
- Material: 7075-T6 aluminum
- Finish: Type III hard-coat anodized black
- Includes: Bolt carrier group, charging handle
- Installation: Drop-in, requires headspace verification
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