Aero Precision M4E1 5.56 NATO ASSEM UPPR RCVR M4 16'' BBL CARBINE BLACK APAR640251M6

Aero Precision’s M4E1 5.56mm Carbine Upper Receiver comes fully assembled, minus only the bolt/carrier group and charging handle - the two components any AR-15 fan with even a little urge to customize wants to replace anyway. Aero’s M4E1 receiver combines the unique look of a custom billet receiver with the affordability and "mil-spec" parts compatibility of a forged receiver. The M4E1 5.56mm Carbine Upper Receiver comes with Aero Precision’s latest Gen 2 Enhanced M-LOK Handguard installed to form a solid, monolithic accessory mounting platform. The full-length Picatinny top rail runs from the rear of the receiver across the entire length of the handguard, which has plenty of M-LOK accessory attachment slots and QD sling swivel sockets at the 3/6/9 o’clock positions. Texture milled into the flats give you a better grip and add to your gun’s unique appearance.

FEATURES

• Forged 7075 T6 aluminum receiver, Mil 8625 Type 3 Class 2 hardcoat anodized
• .250" dia. pivot/takedown pin holes
• Ejection port cover & forward assist installed
• Standard CARBINE-LENGTH gas system with low-profile gas block
• 4150 chrome-moly-vanadium barrel, 1-7" rifling, black QPQ finish
• Chambered for 5.56x45 NATO; accepts .223 Remington, too
• A2-style flash suppressor
• 9" or 15" OAL M-LOK handguard installed depending on model
• Handguard: 1.78" inside diameter clears most muzzle devices and 1.5" suppressors
• Bolt/carrier group & charging handle NOT included
• If you can’t mount each of your accessories on the Aero Precision M4E1 5.56mm Carbine Upper Receiver in the exact perfect spot, at least you know the quest is over - you won’t find one that’s better!