Aero Precision 5.56 NATO AR15 ATLAS S-ONE Slick Side Complete Upper
Available in 10.5″, 16″ Mid-Length, or 16″ Mid-Length Pencil Profile
This Slick Side Complete Upper is the quickest, most efficient, and lightweight way to assemble your custom firearm, fully assembled and warrantied by Aero Precision. This AR15 Slick Side Complete Upper Receiver, paired with the ATLAS S-ONE handguard, streamlines the appearance of your AR15 by removing the Forward Assist. By combining our lightest handguards and barrel profiles with the No Forward Assist Upper Receiver, you can maximize the weight savings for your next build.
*NFA Rules apply for the 10.5″ barreled model. **The muzzle devices are NOT pinned nor welded to the barrel. ***Does not include Bolt Carrier Group or Charging Handle.
AR15 Upper Receiver with No Forward Assist Features:
- M4 Feed ramps
- .250 takedown pin holes
- Laser engraved T-marks
- No forward assist provisions
- Port door installed
ATLAS S-ONE MLOK 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
5.56 Barrel Features:
- Select between a 10.5″ Carbine, 16″ Mid-Length, or 16″ Mid-Length Pencil Profile
- 5.56 NATO 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
- .750 gas block journal | .625 gas block journal (pencil profile)
- Carbine length gas system (10.5″) | Mid-Length Gas (16″)
- .0785 gas port
- M4 Feed Ramp Extension
- HP and MPI tested
- Standard A2 flash hider
Choose between 3 Configurations:
APAR610502M2 – 10.5″ Carbine w/ 9″ ATLAS S-ONE MLOK APAR610505M7 – 16″ Mid w/ 15″ ATLAS S-ONE MLOK APAR610505M39 – 16″ Mid Pencil w/ 15″ ATLAS S-ONE MLOK
Also available with the ATLAS R-ONE Handguards
- AR15 Assembled Slick Side Upper Receiver (No Forward Assist)
- M-LOK ATLAS S-ONE Handguard
- 5.56 NATO 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 with this complete upper receiver is NOT pinned nor welded to this barrel.
|Gas Block Diameter||
Arm or Ally is a stocking dealer for all Aero Precision, Faxon Firearms, Ballistic Advantage, HOLOSUN, Toolcraft, Elftmann Tactical, Timney, TriggerTech, HIPERFIRE and named the #1 Overall E-Commerce Dealer for Aero Precision Products in 2020!
See our growing inventory of AR Parts, and Reloading Components.