Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 Black

Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 Black. 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 5.56 Complete Upper with Flash Hider: Manufacturer: Aero Precision Caliber: 5.56mm Overall Length: 30 in Barrel Length: 20 in Barrel Profile: Government Gas System Length: Rifle Length Barrel Twist Rate: 1-7 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: M4 AR-15 Fabric/Material: 4150 CrMoV 7075-T6 Aluminum Gas Block Journal Size-Diameter: .075 in Handguard Length: 15 in Handguard Style: Hybrid Rail Gun Rail: Picatinny Gun Type: Rifle Gun Make: Aero Precision Barrel Material: 416R Stainless Steel Weight: 4 lb 70 oz Bolt Carrier Group Included: No Charging Handle Included: No Magazine Included: No Condition: New Included Accessories: None Mount Type: M-LOK Country of Origin: USA Features of Aero Precision M4E1-E 20in 5.56 Complete Upper with Flash Hider 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 1pc free float design Rail is Machined from 6061-T6 Aluminum 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 Gen 2 Feature - Quick disconnect sling socket at the 3 6 and 9 o'clock positions Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal Gen 2 Feature - New profile for the continuous picatinny top rail Government Profile Rifle length gas system M4 Feed Ramp Extension HP and MPI tested Standard A2 flash hider Package Contents: Aero Precision M4E1-E 20in 5.56 Complete Upper with Flash Hider M4E1 Enhanced Assembled Upper Receiver Enhanced Handguard of Choice 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 5.56 Complete Upper with Flash Hider is compatible with? The manufacturer says that Aero Precision M4E1-E 20in 5.56 Complete Upper with Flash Hider is compatible with AR-15 M4Aero Precision APAR640251M48: Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 Black