The Aero Precision M4E1 Pro Complete Upper 16" 5.56 Hanson Mid-Length CHF with 15" MOD 4 Handguard in Kodiak Brown Anodized sets a new standard for versatility, precision, and durability. Whether you are building a duty rifle, range toy, or a precision carbine, this upper receiver offers the perfect blend of features and form.

Designed for shooters who demand exceptional reliability, the included Cold Hammer Forged (CHF) Barrel ensures longevity and accuracy. The barrel’s chrome-lined interior provides superior resistance to wear and corrosion, making it ideal for both high-volume shooting and demanding field conditions. With a 1/7 twist rate, the 5.56 NATO chambered barrel delivers excellent performance with heavier bullets, ensuring stability and precision.

The MOD 4 Handguard focuses on Minimal Optical Deflection (MOD), ensuring a stable shooting platform for users relying on lasers and infrared devices. The rigid 15" handguard, crafted from 6061-T6 aluminum, is designed to maintain point-of-impact accuracy under stress. It also features 7-sided M-LOK® slots for attaching lights, grips, or accessories, and QD sling sockets for versatile carry options. Finished in stunning Kodiak Brown Anodized, the upper not only offers exceptional performance but also adds a premium look to your rifle.