Aero Precision M4E1-T MOD4 5.56 NATO AR-15 Barreled Upper Receiver - 14.5"

Aero Precision’s M4E1-T MOD4 14.5" 5.56 NATO Barreled Upper is built for durability, customization, and precision. The MOD4 13.5" handguard, crafted from 6061-T6 aluminum, offers a balance of strength and ergonomics, minimizing optical deflection under load. Its seven-sided M-LOK interface provides ample mounting options, while four QD sockets with steel liners ensure long-term reliability.

This upper includes a 14.5" 5.56 NATO barrel with a mid-length gas system for smoother cycling and reduced recoil. The government-profile barrel features a QPQ finish, a .750" gas block journal, and M4 feed ramps for enhanced reliability. A standard A2 flash hider is installed but not pinned or welded, making it ideal for customization.

Features:

• 14.5" 5.56 NATO barrel with mid-length gas system
• M4E1 threaded upper with billet-style look
• MOD4 13.5" handguard with full Picatinny rail
• 7-sided M-LOK for accessory mounting
• Four QD sling sockets with steel liners
• 6061-T6 aluminum handguard
• Low-profile gas block and gas tube included
• Laser-engraved T-marks
• Standard A2 flash hider (not pinned or welded)

The M4E1 Threaded Upper Receiver boasts a billet-style look with seamless Picatinny rail integration, M4 feed ramps, and laser-engraved T-marks. It comes fully assembled with a port door and forward assist, ready for your next build.