Aero Precision 8" .300 BLK Complete Upper w/ No Forward Assist & M-LOK ATLAS R-ONE Handguard - Black

Aero Precision 8" .300 BLK Complete Upper w/ No Forward Assist & M-LOK ATLAS R-ONE Handguard - BlackThis AR-15 Complete Upper Receiver, paired with the ATLAS R-ONE handguard streamlines the appearance of your next AR-15 build by removing the Forward Assist. By combining our lightest handguards and barrel profiles with the No Forward Assist Upper Receiver you can maximize the weight savings for your next build.Includes:AR15 Assembled Upper Receiver with Forward Assist7" M-LOK ATLAS R-ONE Handguard8" .300 Blackout 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.AR15 Upper Receiver with Forward Assist Features:M4 Feedramps.250 takedown pin holesLaser engraved T-marksNo forward assist provisionsPort door 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 barrels8" .300 Blackout Barrel Features:Length: 8"Twist: 1 in 7Muzzle: 5/8x24 ThreadedMaterial: 4150 Crome Moly VanadiumFinish: QPQ corrosion resistant finish both inside and outGas Block: .750Gas Port: .109Gas System Length: PistolWeight: 18ozM4 Barrel ExtensionHP and MPI Tested