AERO M5E1 COMPLETE UPPER 18 308 SS FLUTED FDE

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. - 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: 5/8x24 - 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