Aero Precision M4E1 Threaded Complete AR-15 Upper Receiver - 12.5” - OD Green Anodized

Starting your next AR-15 build is easier than ever with the Aero Precision M4E1-T Complete Upper Receiver. This product comes fully assembled, saving you time and effort. The M4E1 Threaded Upper Receiver boasts a fresh, enhanced forging that gives it a clean, billet-like appearance. For quick reference, it includes laser-engraved T-marks, and the port door and forward assist come pre-installed.

The 11.4” MOD 4 handguard provides a full top Picatinny rail and 7 sides of M-LOK slots for customizing your set-up with your favorite accessories. It also features quick disconnect (QD) sling sockets at the 3, 6, and 9 o'clock positions, giving you versatile sling attachment options. This handguard is compatible with low-profile gas blocks and has a slim design with a 1.3-inch inside diameter and a 1.5-inch outside diameter.

Features:

• Billet-style M4E1 threaded upper
• Pre-installed port door and forward assist
• 12.5” government profile barrel, 5.56 NATO
• Threaded 1/2x28 and includes A2 flash hide
• 11.4” MOD4 M-LOK handguard
• OD Green anodized finish

The 12.5-inch government profile barrel is chambered in 5.56x45mm NATO and features a QPQ finish for durability. The carbine-length gas system ensures reliable cycling, and the 1/7 twist rate is ideal for stabilizing a wide range of bullet weights. For your peace of mind, the barrel is HP (High Pressure) and MPI (Magnetic Particle Inspected) Tested. Additionally, it comes with a standard A2 flash hider to reduce muzzle flash.