This upper assembly includes Aero Precisions 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.
NOTE: This upper assembly does not include BCG or Charging Handle.
Includes:
- M4E1 Threaded Assembled Upper Receiver
- ATLAS R-ONE Handguard of choice
- .300 Blackout CMV Barrel
- Low Profile Gas Block
- Product comes assembled
- The muzzle brake that comes with this upper assembly receiver is NOT pinned nor welded to this barrel.
M4E1 Threaded Upper Receiver Features:
- New enhanced forging that gives the upper receiver a "billet look"
- New picatinny profile that blends seamlessly with Aero's 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
.300 Blackout Barrel Features:
- Twist: 1 in 7
- Muzzle: 5/8x24 Threaded
- Material: 4150 Crome Moly Vanadium
- Finish: QPQ corrosion resistant finish both inside and out
- Gas Block: .750
- Gas System Length: Pistol
- M4 Feed Ramp Extension, HP and MPI Tested, Standard A2 Flash Hider
8" .300 Blackout Barrel Features:
- Length: 8"
- Gas Port: .109
- Weight: 18oz
10" .300 Blackout Barrel Features:
- Length: 10"
- Gas Port: .0935
- Weight: 21oz
16” .300 Blackout Barrel Features:
Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.
