Aero Precision M4E1 5.56mm 16" Complete Upper Receiver

Aero Precision M4E1 5.56mm M4 Carbine 16 Barrel Complete Upper Receiver Features: This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new profile for the picatinny top rail. Aero Precision M4E1 5.56mm M4 Carbine 16 Barrel Complete Upper Receiver Specifications: Caliber: 5.56x45mm NATO Barrel Length: 16 in Muzzle Device: A2 Flash Hider Gun Model: AR-15 Forged from 7075 T6 aluminum Precision machined to M4E1 specs M4 feedramps Matte black hard coat anodized Mil 8625 Type 3 Class 2 Laser engraved T-marks Comes assembled with port door and forward assist installed Accepts standard AR15/M16 components Handguard mounting platform is forged into the receiver Works with Aero Precision handguards but also fits most BAR-system handguards 1pc free float handguard design Built in anti-rotation tabs Scalloped rails Continuous top rail 1.78 inside diameter fits most muzzle devices and 1.5 suppressors Compatible with low profile gas blocks 5.56 Nato 16 Barrel 1/7 twist 4150 CrMoV QPQ gas port drilled .750 gas block journal Carbine length gas system .0785 gas port M4 Feed Ramp Extension HP and MPI tested Standard A2 flash hider