Upgrade your firearm with the M4E1 Upper Receivers Complete .300 Blackout!
This complete upper includes Aero Precision’s new ATLAS S-ONE Handguard, designed with size and weight in mind, making it the perfect addition to your lightweight build. The proprietary ATLAS attachment system offers a durable and dependable mounting platform, maintaining a slim profile while providing the strength and stability customers have come to love from Aero Precision handguards.
Features:
- M4E1 Threaded Assembled Upper Receiver
- Available configurations:
- 7" M-LOK ATLAS S-ONE Handguard with 7” .300 Blackout CMV Barrel
- 9" M-LOK ATLAS S-ONE Handguard with 10" .300 Blackout CMV Barrel
- 12" M-LOK ATLAS S-ONE Handguard with 16" .300 Blackout CMV Barrel
- Low Profile Gas Block and Pistol Length Gas Tube included in all configurations
- Note: This complete upper does not include BCG or Charging Handle
- The muzzle brake is NOT pinned nor welded to the barrel
M4E1 Threaded Upper Receiver Features:
- New enhanced forging for a "billet look"
- New picatinny profile that blends seamlessly with Enhanced Series Handguards
- M4 Feedramps
- .250 takedown pin holes
- Laser engraved T-marks
- Includes port door and forward assist installed
ATLAS S-ONE Handguard Features:
- Front and rear picatinny rail
- Eliminated center of top rail for weight reduction
- Indexing grooves in 12:00 position for positive grip control
- 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
Barrel Specifications:
- 8" .300 Blackout Barrel:
- Length: 8"
- Twist: 1 in 7
- Muzzle: 5/8x24 Threaded
- Material: 4150 Chrome Moly Vanadium
- Finish: QPQ corrosion resistant finish both inside and out
- Gas Block: .750
- Gas Port: .109
- Gas System Length: Pistol
- Weight: 18 oz
- M4 Barrel Extension
- HP and MPI Tested
- 10" .300 Blackout Barrel:
- Length: 10"
- Twist: 1 in 7
- Muzzle: 5/8x24 Threaded
- Material: 4150 Chrome Moly Vanadium
- Finish: QPQ corrosion resistant finish both inside and out
- Gas Block: .750
- Gas Port: .0935
- Gas System Length: Pistol
- Weight: 21 oz
- M4 Barrel Extension
- HP and MPI Tested
- 16" .300 Blackout Barrel:
- Chamber: .300 Blackout
- Length: 16"
- Material: 4150 Chrome Moly Vanadium
- Finish: QPQ Corrosion Resistant Finish
- Gas System Length: Pistol
- Gas Block Journal: .750"
- Twist Rate: 1:7 Inches
- Muzzle: 5/8x24 Threaded
- Weight: 29 oz
- M4 Feed Ramp Extension, HP and MPI Tested
- Standard A2 Flash Hider