This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our 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.
Includes:
- M4E1 Threaded Assembled Upper Receiver
- ATLAS S-ONE Handguard of choice
- 20" 5.56 Rifle Length CMV Barrel
- Low Profile Gas Block and Rifle Length Gas Tube
- Product comes assembled
- This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab
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 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
- Learn More about our NEW ATLAS S-ONE Hanguards
20" 5.56 Rifle Length CMV Barrel Features:
- 5.56 NATO 20" Rifle Length, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
- .750 gas block journal
- Government Profile
- Rifle length gas system, .0785 gas port
- M4 Feed Ramp Extension
- HP and MPI tested
- Standard A2 flash hider
| Made In America? | Yes |
|---|---|
| Platform | AR15 |
| Series | R-ONE/S-ONE |
| Caliber | 5.56 NATO |
| Barrel Length | 20" |
| Weight(s) | 61 oz |
| Other | NOTE: Weights above include Gen 2 Upper, Handguard, Barrel, Muzzle Brake and Mounting Hardware. |