Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver w/ 9" M-LOK ATLAS S-ONE Handguard

Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver w/ 9" M-LOK ATLAS S-ONE HandguardThis complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. 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 Receiver9" ATLAS S-ONE M-LOK Handguard11.5" 5.56 CMV Barrel, Carbine LengthLow Profile Gas Block and Carbine 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 S-ONE Handguard Features:Front and rear picatinny railEliminated center of top rail for weight reductionIndexing grooves in 12:00 position for positive grip controlQuick 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 Handguards11.5" 5.56 Barrel Features:5.56 Nato 11.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilledGovernment Profile.750 gas block journalCarbine length gas system, .0785 gas portM4 Feed Ramp ExtensionHP and MPI testedStandard A2 flash hiderSpecifications:Shipping to FFL Dealer Required NoMade In America? YesPlatform AR15Series ATLASCaliber 5.56 NATOBarrel Length 11.5"