Aero Precision M4E1 Threaded Assembled Upper and ATLAS S-ONE 9″ M-LOK Combo Set – Black

(2 customer reviews)

$238.48 $195.06

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SKU: APAR700302SC Categories: ,



  • Aero Precision AR15 Gens 2 Assembled Upper Receiver
  • Aero Precision ATLAS S-ONE 9″ 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 9″, 12” and 15” options (7”  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

2 reviews for Aero Precision M4E1 Threaded Assembled Upper and ATLAS S-ONE 9″ M-LOK Combo Set – Black

  1. Tom H. (verified owner)

    Excellent price and the item was exactly what I paid for. Only ding is the shipping was a wee bit slow but that was more on FedEx than anyone else.

  2. Anonymous (verified owner)

    Awesome service fast delivery

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