Aero Precision Complete Upper Receiver M4E1-E 5.56x45mm NATO 20in Government Rifle Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE

Aero Precision Complete Upper Receiver M4E1-E 5.56x45mm NATO 20in Government Rifle Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE. 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. Specifications for Aero Precision M4E1-E 20in 5.56x45mm NATO EM15 Complete Upper Receiver: Manufacturer: Aero Precision Caliber: 5.56x45mm NATO Overall Length: 28 in Barrel Length: 20 in Barrel Profile: Government Gas System Length: Rifle Length Barrel Twist Rate: 1-7 Firearms Threads Per Inch: 1/2×28 Handguard Type: A2 Muzzle Device: A2 Flash Hider Finish: Cerakote Color: FDE Gun Model: AR-15 Gas Block Journal Size-Diameter: .750 in Handguard Length: 15 in Gun Type: Rifle Gun Make: AR Platform Barrel Material: 4150 CMV Steel Bolt Carrier Group Included: No Charging Handle Included: No Magazine Included: No Country of Origin: USA Features of Aero Precision M4E1-E 20in 5.56x45mm NATO EM15 Complete Upper Receiver Precision machined to M4E1 specs M4 feedramps Matte black hard coat anodized Mil 8625 Type 3 Class 2 Laser engraved T-marks (Anodized only) 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 Package Contents: Aero Precision M4E1-E 20in 5.56x45mm NATO EM15 Complete Upper Receiver M4E1 Enhanced Assembled Upper Receiver Enhanced Handguard Of Choice 20in 5.56 Rifle Length CMV Barrel Low Profile Gas Block Rifle Length Gas Tube What firearm models does the manufacturer say Aero Precision M4E1-E 20in 5.56x45mm NATO EM15 Complete Upper Receiver is compatible with? The manufacturer says that Aero Precision M4E1-E 20in 5.56x45mm NATO EM15 Complete Upper Receiver is compatible with AR-15Aero Precision APAR640252M48: Complete Upper Receiver M4E1-E 5.56x45mm NATO 20in Government Rifle Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE