Aero Precision M4E1-T Complete Upper, 12.5″ 5.56 Mid-Length Gov Profile Barrel, 11.4″ MOD 4 Handguard – Kodiak Brown
Aero Precision M4E1-T Complete Upper, 12.5″ 5.56 Mid-Length Gov Profile Barrel, 11.4″ MOD 4 Handguard – Kodiak Brown is a premium upper assembly designed for AR-15 enthusiasts seeking a balance of performance, durability, and aesthetics. This complete upper combines precision machining with thoughtful design features to deliver exceptional functionality and a distinctive finish.
Upper Receiver: The foundation of this assembly is the M4E1 Threaded Assembled Upper Receiver, which features an enhanced forging that provides a billet-like appearance while maintaining the strength of a forged component. It includes M4 feed ramps, .250 takedown pin holes, and laser-engraved T-marks. The receiver comes pre-installed with a port door and forward assist, ensuring readiness out of the box.
Barrel: The 12.5-inch 5.56 NATO barrel is constructed with a government profile and a QPQ (Quench-Polish-Quench) finish for enhanced corrosion resistance and longevity. It features a 1:7 twist rate, M4 feed ramp extension, and a .750-inch gas block journal. The carbine-length gas system ensures reliable cycling, and the barrel is both HP and MPI tested for quality assurance. A standard A2 flash hider is included. Note: The muzzle device is not pinned or welded; per the National Firearms Act, it must be pinned and welded to achieve the necessary 16″ overall length for a rifle build.
Handguard: The included 11.4-inch MOD 4 Handguard is machined from 6061-T6 aluminum, emphasizing stiffness to reduce deflection under load. Its 7-sided M-LOK interface allows for versatile accessory attachment, and the full-length Picatinny top rail provides additional mounting options. The handguard features four QD sling sockets with steel liners at the 3, 6, and 9 o’clock positions, ensuring durability with repeated use. It attaches to the upper receiver via a steel barrel nut, minimizing point-of-impact shifts when using infrared laser aiming devices.
Finish: The entire assembly boasts a Kodiak Brown anodized finish, offering a unique aesthetic while providing additional surface protection.
Specifications:
- Platform: AR15
- Caliber: 5.56 NATO
- Barrel Length: 12.5 inches
- Gas System: Carbine-Length
- Handguard Length: 11.4 inches
- Finish: Kodiak Brown Anodized
- Made in the USA
This complete upper assembly is ideal for builders seeking a compact, reliable, and visually distinctive upper for their AR-15 platform. Please note that it does not include a bolt carrier group or charging handle.
Product Information
| Product Type | Upper Receiver, Complete Upper |
|---|---|
| Material | 4150 Chrome Moly Vanadium, 7075-T6 Aluminum |
| Gas System | Carbine |
| Muzzle Thread | 1/2×28 |
| Handguard | 11.4" M-LOK |
| Series | M4E1, MOD 4 |
| Color | Kodiak Brown |
| Manufacturer | Aero Precision |
| Platform | AR15 |
| Finish | Anodized |
| Caliber | 5.56 NATO |
| Length | 12.5" |
| Twist Rate | 1:7 |
| Barrel Finish | QPQ Nitride |
| Compatibility | Standard AR15 components |
| Made in USA | Yes |
Important!
We fully comply with all federal, state, and local laws regarding the sale of restricted products. We do not market or sell to prohibited jurisdictions, and any attempts to induce illegal activity, including by law enforcement or government agencies, will be rejected and may be reported. All orders are subject to legal verification, and those in violation will be canceled. By using this site, you confirm compliance with all applicable laws.
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