Aero Precision - M4E1 Threaded 7.5" 5.56 Complete Upper

Aero Precision M4E1 Threaded Complete Upper (APAR700301M0) this complete upper includes our new 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.

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

7.5″ 5.56 Pistol Length Barrel Features:

• Chamber: 5.56
  
• Length: 7.5″
  
• Twist: 1 in 7
  
• Threading: 1/2″x28
  
• Material: Chrome Moly Vanadium
  
• Finish: QPQ corrosion resistant finish both inside and out
  
• Gas Block: .750
  
• Gas System Length: Pistol
  
• Weight: 17.25 oz
  
• M4 Barrel Extension
  
• HP and MPI Tested