Aero Precision M4E1 Threaded 16″ .300 Blackout Complete Upper Receiver w/ ATLAS S-ONE Handguard

Includes:

• M4E1 Threaded Assembled Upper Receiver
• Enhanced Handguard of choice
• 16″ .300 Blackout CMV Barrel
• Low Profile Gas Block and Pistol 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

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 S-ONE Hanguards

Barrel Features:

• Chamber: .300 Blackout
• Length: 16″
• Material: 4150 Chome Moly Vanadium
• Finish: QPQ Corrosion Resistant Finish
• Gas System Length: Pistol
• Gas Block Journal: .750″
• Twist Rate: 1:7 Inches
• Muzzle: 5/8×24 Threaded
• Weight: 29oz
• Other; M4 Feed Ramp Extension, HP and MPI Tested, Standard A2 Flash Hider