Aero Precision 5.56 NATO M4E1 ATLAS R-ONE Complete Upper
Available in 10.5" Carbine or 16" Mid-Length
Aero Precision 5.56 NATO M4E1 ATLAS R-ONE Complete Upper is the most efficient way to assemble your own custom firearm; fully assembled and warrantied by Aero Precision. The R-ONE handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's 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.
*NFA Rules apply for the 10.5" barreled model.
**The muzzle devices are NOT pinned nor welded to the barrel.
***Does not include Bolt Carrier Group or Charging Handle.
M4E1 Threaded Upper Receiver Features:
- New enhanced forging that gives the upper receiver a "billet look"
- 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
5.56 Barrel Features:
- Select between a 10.5" Carbine or 16" Mid-Length barrel
- 5.56 NATO 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
- .750 gas block journal
- Carbine length gas system (10.5") | Mid-Length Gas (16")
- .0785 gas port
- M4 Feed Ramp Extension
- HP and MPI tested
- Standard A2 flash hider
Choose between 2 Configurations:
APAR700702M2 - 10.5" Carbine w/ 9" ATLAS R-ONE MLOK
APAR700705M7 - 16" Mid w/ 15" ATLAS R-ONE MLOK
- M4E1 Threaded Assembled Upper Receiver
- M-LOK ATLAS R-ONE Handguard
- 10.5" or 16" 5.56 CMV Barrel
- Low Profile Gas Block and Gas Tube
- Product comes assembled
- This complete upper does not include BCG or Charging Handle.
- The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.
Manufacturer: Aero Precision
Brand: Aero Precision
SKU: APAR700702M2 | APAR700705M7
Caliber: 5.56 NATO
Complete Upper Series: ATLAS
Handguard Dims: OD: 1.5" | ID: 1.3"
Handguard Type: M-LOK
Gas Block Diameter: .750
Muzzle Device: A2 Flash Hider
Muzzle Threads: 1/2x28 TPI
Barrel Length: 10.5" | 16"
Barrel Finish: QPQ Melonite
MSRP: $434.99 to $484.99