Aero Precision M4E1 Threaded Assembled Upper and ATLAS S-ONE 15″ M-LOK Combo Set – Black

(8 customer reviews)

$256.48 $218.01

Out of stock

Email when stock is available

SKU: APAR700305SC Categories: ,



  • Aero Precision AR15 Gens 2 Assembled Upper Receiver
  • Aero Precision ATLAS S-ONE 15″ M-LOK
  • Handguard Mounting Hardware


ATLAS S-ONE Handguard

The ATLAS S-ONE is the newest addition to the Aero Precision Handguard lineup. Machined from 6061-T6 Aluminum, the S-ONE line of handguards are designed with size and weight in mind, providing the perfect handguard for 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.

Available in KeyMod™ and M-LOK® profiles with 12” and 15” options (7” and 9” options coming soon).


  • 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


AR15 Gen 2 Upper Receiver

The AR15 Gen 2 Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum, precision machined to work with all mil-spec AR15 parts and includes the port door and forward assist pre-installed. Get the billet look without paying the billet price!

Gen 2 Upper 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

Additional information

Weight 2 lbs
Dimensions 16 × 6 × 4 in

8 reviews for Aero Precision M4E1 Threaded Assembled Upper and ATLAS S-ONE 15″ M-LOK Combo Set – Black

  1. Anonymous (verified owner)

    great product

  2. David S. (verified owner)

    Great price on the Aero upper and Atlas Handguard. Shipping was quick. Next build will start with a visit to B. King Firearms!

  3. Rick Sovastion (verified owner)

    The installation was crazy easy. This was not an easy part to find, but B kings had it.

  4. Jeff (verified owner)


  5. James Cable (verified owner)

    Fast shipping great price

  6. Anonymous (verified owner)

    Excellent fit and perfect condition!!!

  7. Stephen (verified owner)

    Best price around, *and* the only place who had them in stock! Love the Atlas, really easy to install.

  8. Darrius Wilborn (verified owner)

    Love the upper setup and price.

Only logged in customers who have purchased this product may leave a review.