Aero Precision 18" Fluted M4E1 Upper .223/5.56 Wylde Rifle Atlas S-One AR15 AR-15 Sniper

The Aero Precision AR-15 barreled upper receiver is built around the M4E1 Threaded upper receiver designed for use with standard barrel nuts. The receiver is forged from 7075-T6 aluminum and precision machined to M4E1 specs to ensure proper fit with Mil-Spec and aftermarket parts. It is matte black hardcoat anodized and features laser engraved T-marks on the upper picatinny rail. This 18” .223 Wylde barreled upper comes with the Atlas S-One M-LOK free float handguard that features improved ergonomics, and a lightweight design with scalloped picatinny top rail. It also features a slim 1.3" internal diameter with indexing grooves for a comfortable grip.

Includes:

• M4E1 Assembled Upper Receiver with Forward Assist
• 15" M-LOK ATLAS S-ONE Handguard with Continuous Monolithic Top Rail
• 18” .223 Wylde barrel
• 416R stainless steel fluted barrel
• HPT and MPI
• Bead blasted finish
• 1:8 twist rate
• Rifle length gas system
• Low Profile Gas Block and Rifle Length Gas Tube
• Product comes assembled
• This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tab
• The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.

M4E1 Threaded Upper Receiver Features:

• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks
• New enhanced forging that gives the upper receiver a "billet look"
• New picatinny profile that blends seamlessly with our Enhanced Series Handguards
• Port door installed

ATLAS S-ONE Handguard Features:

• Lightweight picatinny rail for sights and optics
• Indexing grooves in 12:00 position for positive grip control
• Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
• Compatible with low profile gas blocks
• 1.3" Inside diameter
• 1.5" Outside diameter
• Compatible with mil-spec AR15 upper receivers and barrels

Barrel Features: