ASK AN EXPERTDescription
- M4E1 Threaded Assembled Upper Receiver
- 12.7" ATLAS R-ONE Handguard of choice
- 13.9" 5.56 Mid-Length CMV Barrel
- Low Profile Gas Block and Pistol Length Gas Tube
- Product comes assembled
- This complete upper does not include BCG or Charging Handle
The AERO PRECISION M4E1-T 13.9in 5.56mm Threaded Complete Upper Receiver includes the 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.
Warranty Information
| 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 |
