Aero Precision M4E1 18″ 223 Wylde 16.6″ S-ONE Complete Upper

This Aero Precision M4E1 18″ 223 Wylde 16.6″ S-ONE 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. 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 Receiver
• 16.6″ M-LOK ATLAS S-ONE Handguard
• 18″ .223 Wylde Stainless Steel QPQ Barrel, Rifle Length
• Pinned Low Profile Gas Block and Rifle Length Gas Tube
• A2 Flash Hider
• Product comes assembled
• This 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 Handguards
• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks
• Includes port door and forward assist installed

ATLAS S-ONE Handguard Features:

• Front and rear picatinny rail
• Eliminated center of top rail for weight reduction
• 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
• Learn More about our NEW ATLAS Handguards

18″ .223 Wylde Stainless Steel QPQ Barrel, Rifle Length Features:

• .223 Wylde 18″ Rifle Length Barrel, 1/8 Twist
• QPQ Corrosion Resistant Finish
• .750 gas block journal
• Rifle length gas system
• M4 Feed Ramp Extension
• HP and MPI tested
• Standard A2 flash hider