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Aero Precision 300 Blackout M4E1 ATLAS S-ONE Complete Upper
Available in black or FDE with your choice of 3 barrel lengths.
Aero Precision 300 Blackout M4E1 ATLAS S-ONE Complete Upper is the most efficient way to assemble your own custom firearm; fully assembled and warrantied by Aero Precision. The S-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.
**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 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
300 BLK Barrel Features:
- Select between a 8″, 10″ or 16″ barrel.
- .300 Blackout 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
- .750 gas block journal
- Gas Port: .0935
- Pistol length gas system.
- M4 Feed Ramp Extension
- M4 Barrel Extension
- HP and MPI tested
- Standard A2 flash hider
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Choose between 3 Configurations:
APAR700301M1 / APAR700311M1 – 8″ Barrel w/ 7″ ATLAS S-ONE MLOK
APAR700302M4 / APAR700312M4 – 10″ Barrel w/ 9″ ATLAS S-ONE MLOK
APAR700305M14 / APAR700315M14 – 16″ Barrel w/ 15″ ATLAS S-ONE MLOK
Also available with the ATLAS R-ONE Handguards
Includes:
- M4E1 Threaded Assembled Upper Receiver
- M-LOK ATLAS S-ONE Handguard
- 8″, 10″, or 16″ 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.
Product Information
Manufacturer: Aero Precision
Brand: Aero Precision
SKU: APAR700301M1 | APAR700311M1 | APAR700302M4 | APAR700312M4 | APAR700305M14 | APAR700315M14
Assembled: Yes
Finish: Anodize | Cerakote
Color: Black | FDE
Caliber: .300 Blackout
Platform: AR15
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: 5/8×24 TPI
Barrel Length: 8″ | 10″ | 16″
Barrel Finish: QPQ Melonite
MSRP: $439.99 to $524.99
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