Aero Precision AR-15 M4E1-E Complete Upper Assembly 5.56x45mm NATO 8" Barrel 7.3" ATLAS R-ONE Handguard Black

Aero Precision M4E1 Threaded Complete Upper, 8" 5.56 Barrel, 7.3" M-LOK ATLAS R-ONE Handguard - Anodized BlackThis complete upper includes our ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.Includes:M4E1 Threaded Assembled Upper Receiver7.3" M-LOK ATLAS R-ONE Handguard8" 5.56 Pistol Length CMV BarrelLow Profile Gas Block and Pistol Length Gas TubeProduct comes assembledThis complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tabThe muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.M4E1 Threaded Upper Receiver Features:New enhanced forging that gives the upper receiver a "billet look"New picatinny profile that blends seamlessly with our Enhanced Series HandguardsM4 Feedramps.250 takedown pin holesLaser engraved T-marksIncludes port door and forward assist installedATLAS R-ONE Handguard Features:Full top picatinny rail for optional attachmentsQuick disconnect sling socket at the 3, 6 and 9 o'clock positionsCompatible with low profile gas blocks1.3" Inside diameter1.5" Outside diameterCompatible with mil-spec AR15 upper receivers and barrelsLearn More about our NEW ATLAS Handguards8" 5.56 Pistol Length Barrel Features:Chamber: 5.56Length: 8"Twist: 1 in 7Threading: 1/2"x28Material: Chrome Moly VanadiumFinish: QPQ corrosion resistant finish both inside and outGas Block: .750Gas System Length: PistolWeight: 17.76 ozM4 Barrel ExtensionHP and MPI TestedSpecifications:Shipping to FFL Dealer Required NoMade In America? YesPlatform AR15Series ATLASCaliber 5.56 NATOBarrel Length 8"