Aero Precision M4E1 Threaded Complete Upper 16" 5.56 Mid Pencil Length Barrel, ATLAS R-ONE 15" M-LOK HG - Anodized - APAR700705M39

This complete upper includes Aero Precision’s new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Their 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 – Anodized Black
• 15″ ATLAS R-ONE M-LOK Handguard with 16″ 5.56 CMV Barrel
• Low Profile Gas Block and Mid-Length Gas Tube
• 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 R-ONE Handguard Features:

• Full top picatinny rail for optional attachments
• 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

16″ 5.56 Mid-Length Barrel Features:

• 5.56 NATO 16″ Mid-length, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
• Mid-length gas system
• M4 Feed Ramp Extension
• HP and MPI tested
• Standard A2 flash hider