Aero Precision M4E1-T Complete Upper, 12.5″ 5.56 Mid-Length Gov Profile Barrel, 11.4″ MOD 4 Handguard – OD Green

The Aero Precision M4E1-T Complete Upper, 12.5″ 5.56 Mid-Length Gov Profile Barrel, 11.4″ MOD 4 Handguard – OD Green is a refined short-length upper for builders prioritizing compact size without sacrificing performance or durability. The 12.5″ barrel configuration is widely favored for its versatility in suppressed and unsuppressed roles, offering optimal gas system timing and balance.

At the core is a 4150 Chrome Moly Vanadium barrel with a QPQ Nitride finish that enhances wear resistance and corrosion protection. A 1:7 twist rate ensures stability with both standard and heavier 5.56 NATO projectiles. The mid-length gas system provides smoother recoil impulse and reliable cycling, making this upper well-suited for defensive, duty, or general-purpose use. The government profile adds strength while keeping unnecessary weight down.

Aero Precision’s 11.4″ MOD 4 Handguard delivers rock-solid rigidity with a free-float design that improves accuracy potential. It features full-length Picatinny rail along the top and M-LOK slots on seven sides for modern accessory compatibility. Four steel-lined QD sling sockets are built in for flexible sling placement. The OD Green anodized finish gives this upper a distinct and rugged look, perfect for color-matched builds or contrast configurations.

The M4E1 threaded upper receiver is forged from 7075-T6 aluminum and includes both a forward assist and port door. It features M4 feed ramps and a Nickel Boron-coated barrel extension for consistent and reliable feeding under hard use. The 1/2×28 muzzle threads are topped with a standard A2 flash hider and ready for muzzle device upgrades or pin-and-weld applications.

Designed for use with any mil-spec AR-15 lower receiver, this complete upper offers professional-grade construction, modular capability, and a durable OD Green finish, making it a top-tier choice for modern carbine builders.