Aero Precision M4E1-T Complete Upper, 14.5" 5.56 Mid-Length Gov Profile Barrel, 13.5" MOD 4 Handguard - Black

Aero Precision M4E1-T Complete Upper, 14.5″ 5.56 Mid-Length Gov Profile Barrel, 13.5″ MOD 4 Handguard – Black

Precision-Built Mid-Length Upper for Tactical and Duty Use

The Aero Precision M4E1-T Complete Upper delivers a balanced and reliable configuration for professional use, training, or advanced defensive builds. Centered around Aero’s M4E1 Enhanced Upper Receiver, this system integrates strength, precision, and modularity for shooters who demand consistency under pressure.

High-Performance 14.5″ 5.56 Barrel

The 14.5-inch 4150 Chrome Moly Vanadium barrel is QPQ Nitride treated for exceptional corrosion resistance and extended barrel life. A 1:7 twist rate ensures optimal stabilization for heavier 5.56 NATO and .223 Remington projectiles, providing reliable accuracy across a variety of applications. The government profile maintains excellent handling characteristics while balancing weight and heat management.

MOD 4 Handguard and Mounting Versatility

Featuring a 13.5-inch MOD 4 Handguard with a continuous Picatinny top rail and M-LOK attachment points along the sides and bottom, this upper supports a wide range of accessories—from lights and grips to lasers and pressure switches. The free-floating design preserves barrel harmonics for consistent accuracy without adding unnecessary weight.

Enhanced Construction and Gas System

The receiver is machined from 7075-T6 aluminum and protected with a Type III hardcoat anodized finish for maximum durability. The mid-length gas system produces a smoother recoil impulse and reduces wear on moving components. Additional features include a forward assist, port door assembly, and M4 Feed Ramp Extension for reliable chambering during high-volume fire.

Ready for Compliance and Customization

Threaded at 1/2×28 with an 11° target crown, this barrel is both suppressor- and muzzle brake–ready. It ships with a pinned and welded muzzle device, making it NFA-compliant when paired correctly. Fully compatible with all mil-spec AR15 lower receivers, this upper is ideal for builders seeking a durable, mid-length solution in a compact 14.5″ platform.

Key Specifications:

• Barrel: 14.5″ 4150 CMV, QPQ Nitride finish
• Twist Rate: 1:7
• Gas System: Mid-length
• Receiver: 7075-T6 aluminum, Type III hardcoat anodized
• Handguard: 13.5″ MOD 4 M-LOK free-float with full-length Picatinny top rail
• Muzzle Threads: 1/2×28 with 11° target crown
• Feed Ramps: M4 cut
• Compatibility: Standard mil-spec AR15 lower receivers