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

(1 customer review)

$299.99 $233.31

Out of stock

Email when stock is available

SKU: APAR700312SC Categories: ,



  • Aero Precision AR15 Gens 2 Assembled Upper Receiver in FDE
  • Aero Precision ATLAS S-ONE 9″ M-LOK in FDE
  • 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
  • Includes port door and forward assist installed

Additional information

Weight 2 lbs
Dimensions 16 × 6 × 4 in

1 review for Aero Precision M4E1 Threaded Assembled Upper and ATLAS S-ONE 9″ M-LOK Combo Set – FDE

  1. john s. (verified owner)

    Great Service and Great Prices!

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