Atlas S-One.
Complete Upper.
The Aero Precision M4E1 threaded 5.56 complete upper 16" M-LOK S-One 15" assembled upper includes the Atlas S-One handguard. The S-One line of handguards are designed with size and weight in mind, providing the perfect addition to your Aero Precision M4E1 lightweight build. Aero'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.
Mil Spec.
Atlas S-One.
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
Gas Block.
A2 Flash Hider.
16" 5.56 Mid-Length Barrel Features
5.56 NATO 16" Midlength, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
.750 gas block journal
Mid-length gas system, .0785 gas port
M4 Feed Ramp Extension
HP and MPI tested
Standard A2 flash hider
Aero Precision M4E1 Threaded Complete Upper Specs
Manufacturer: Aero Precision
Model: M4E1 Threaded 5.56 Complete Upper 16" M-LOK S-One 15"
Caliber: 5.56x45mm NATO
Muzzle Device: A2 Flash Hider
Gun Model: AR-15
Upper Receiver: M4E1 threaded
Forged: 7075-T6 aluminum
Assembled Forward Assist: Yes
Handguard: 15” ATLAS S-ONE
Gun Rail: M-LOK
Anodized: Yes, hardcoat
Barrel: 16” 5.56 NATO
Machined: Yes, from chrome moly vanadium
Gas System: Mid-length
Twist Rate: 1:7
Threaded: Yes, 1/2x28
Finish: Salt bath nitride
UPC: 840014601585
SKU: APAR700305M7
The muzzle brake that comes with this upper receiver is NOT pinned nor welded to this barrel.
This upper does not include BCG or Charging Handle.
