Aero Precision M4E1 Gas Piston Complete Upper 18in 223 Wylde Barrel M-LOK

Aero Precision APAR100218M76: This contract overrun upper receiver is built around the M4E1 Enhanced upper receiver and is powered by a mid-length piston gas system. This gas system offers a range of adjustments and provides a different operating system that results in less upper receiver fouling than traditional direct impingement systems. INCLUDES: M4E1 Enhanced Upper Receiver, 15" Enhanced Handguard, Dimpled 18" .223 Wylde CMV Rifle Length Barrel, VG6 Epsilon Muzzle Device, Superlative Arms Mid-Length Piston System, Assembled BCG w/ Superlative Arms Piston Bolt Carrier, Aero Precision Ambidextrous Charging Handle. M4E1 UPPER FEATURES: 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, Barrel nut and wrench are included. GEN 2 ENHANCED HANDGUARD FEATURES: 1pc free float 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, Quick disconnect sling socket at the 3, 6 and 9 o'clock positions, Additional milling along flats to aid with gripping and add visual appeal, New profile for the continuous picatinny top rail. 18" .223 Wylde Rifle Length Barrel Features: Chamber: .223, Length: 18", Twist: 1 in 8, Threading: 1/2"x28, Material: 416R Stainless Steel, Finish: QPQ corrosion resistant finish both inside and out, Gas Block Journal: .750, Dimpled Gas Block Journal, Gas System Length: Rifle, Weight: 40oz, M4 Barrel Extension