Aero Precision M5E1 Features The 18-inch 4150 Chrome Moly Vanadium (CMV) steel barrel features a 1:10 twist rate, optimizing bullet stabilization for improved accuracy. The barrel is treated with a QPQ corrosion-resistant finish inside and out, enhancing durability and longevity. A rifle-length gas system ensures reliable cycling, while the .750-inch gas block journal accommodates low-profile gas blocks. The M5E1 upper receiver is forged from 7075-T6 aluminum, providing strength without unnecessary weight. It includes M4 feed ramps and comes assembled with a forward assist and port door installed. The integrated handguard mounting platform simplifies assembly and enhances rigidity. Paired with a 16.6-inch Gen 2 Enhanced M-LOK Handguard, this upper offers ample space for accessory attachment. The handguard features quick disconnect sling sockets at the 3, 6, and 9 o’clock positions, built-in anti-rotation tabs, and a continuous top rail for seamless integration of optics and sights. The 1.78-inch inside diameter accommodates most muzzle devices and 1.5-inch suppressors. A standard .308 A2 birdcage flash hider is installed to reduce muzzle flash. Aero Precision M5E1 Specifications Caliber: .308 Winchester Barrel Length: 18 inches Barrel Material: 4150 Chrome Moly Vanadium Steel Barrel Finish: QPQ corrosion-resistant finish Twist Rate: 1:10 Gas System Length: Rifle Gas Block Journal: .750 inches Muzzle Thread Pattern: 5/8×24 Muzzle Device: .308 A2 birdcage flash hider Upper Receiver Material: 7075-T6 aluminum Handguard Length: 16.6 inches Handguard Type: Gen 2 Enhanced M-LOK Handguard Material: 6061-T6 aluminum Handguard Features: Quick disconnect sling sockets at 3, 6, and 9 o’clock positions Built-in anti-rotation tabs Continuous top rail 1.78-inch inside diameter Finish: Flat Dark Earth (FDE) Cerakote Weight: Approximately 56.64 ounces More Information Barrel Length 18 Caliber .308 Win Condition New in Box Finish Per Color Flat Dark Earth Manufacturer Aero Precision Manufacturer Part Number APAR308556M69 Model M5E1 Complete Upper Type Uppers UPC 815421028614
