M4E1 Threaded Complete Upper, 16" 5.56 HBAR Mid-Length Barrel w/ 15" R-ONE M-LOK HG - FDE Cerakote

This complete upper receiver incudes an HBAR profile barrel that is laser marked "HBAR".

Includes:

• M4E1 Threaded Assembled Upper Receiver
• 15" ATLAS S-ONE M-LOK Handguard
• 16" 5.56 HBAR Barrel
• Low Profile Gas Block and Mid-Length Gas Tube
• AR15 A2 Birdcage Flash Hider
• 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 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