Aero Precision M4E1 Threaded 16in 223 Wylde Complete Upper Receiver

This complete upper includes our 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. Aero Precision's 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. This complete upper does not include BCG or Charging Handle. Includes:M4E1 Threaded Assembled Upper Receiver15" M-LOK ATLAS R-ONE Handguard of choice16" .223 Wylde Stainless Steel QPQ Barrel, Mid-LengthPinned Low Profile Gas Block and Mid-Length Gas TubeA2 Flash HiderProduct comes assembledM4E1 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 barrels16" .223 Wylde Stainless Steel QPQ Barrel, Mid-Length Features:.223 Wylde 16" Mid Length Barrel, 1/8 TwistQPQ Corrosion Resistant Finish.750 gas block journalMid length gas systemM4 Feed Ramp ExtensionHP and MPI testedStandard A2 flash hider