Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel w/ 15" ATLAS R-ONE M-LOK Handguard - FDE

Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel w/ 15" ATLAS R-ONE M-LOK Handguard - FDEThis complete upper includes Aero's new 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.Includes:M4E1 Threaded Assembled Upper ReceiverATLAS R-ONE Handguard16" 5.56 CMV BarrelLow Profile Gas Block and Mid-Length Gas TubeProduct comes assembledThis complete upper does not include BCG or Charging Handle.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 barrels16" 5.56 Mid-Length Barrel Features:5.56 NATO 16" Midlength, 1:7 twist, 4150 CrMoV, QPQ, gas port drilled.750 gas block journalMid-length gas system, .0785 gas portM4 Feed Ramp ExtensionHP and MPI testedStandard: A2 flash hider