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Questions & Answers
Barrel manufacturer?

I've been using Aero products for years and to the best of my knowledge Ballistic Advantage makes all Aeros barrels. I may be mistaken because I don't know 100%. Either way I can assure you that the quality of any Aero product is top notch. you won't be disappointed.

by Bob, Verified Owner, April 17, 2021
Hello, Does upper receiver include Bcg and charging handle? Expert Answer

The Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver does not include a charging handle or BCG.

by Ethan, Gear Expert, December 6, 2024
Customer Reviews
Helpful Positive Review
Aero Precision 11.5 Atlas S~One Upper by Rando, September 20, 2021
This upper is rock solid yet light weight. Gotta admit that it’s a little strange not having full rail length, but he contour makes it handy and comfortable. There’s plenty of M-Lok spaces for attaching just about anything in a usable position alon...
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1/1 found this helpful
Most Recent Reviews
Aero precision M4E1 upper by bird, Verified Owner, December 23, 2023
This barrel is very accurate and came very well packaged as well as very fast
Most Recent Reviews
Aero precision upper by Marcus Schubert, Verified Owner, July 29, 2021
Amazing product. Product arrived safely and very much on time and good delivery time. Enjoyed completing my project rifle cannot wait to test it at the range. Mated it to a spikes tactical hand built lower with rise armament trigger.
Most Recent Reviews
This upper was shipped extremely fast and come well packaged. All the components are top notch as your would expect and can’t wait to get it on my new build. Optics planet usually has all the aero stuff I need to get going on a new build, and this wa...
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Read All 4 Reviews

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Product Info for Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider

Enhance the tactical capabilities of your weapon by equipping this Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE, w/ A2 Flash Hider Handguard Complete Upper Receiver. Each of these AR15 Upper Receivers by Aero Precision feature front and rear Picatinny railswith engraved T-marks to easily attach optics, lasers, lights and other accessories The Aero Precision M4E1 Threaded 5.56 w/ ATLAS S-ONE Handguard Complete Upper Rifle Receiver also has QD sling socketsat the 3, 6 and 9 o'clock positions for the attachment of a sling. Create a tougher, more customized weapon by installing this Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver, 11.5in Barrel.image

WARNING: California`s Proposition 65

Specifications for Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider:

Manufacturer: Aero Precision
Caliber: 5.56x45mm NATO
Barrel Length: 11.5 in
Gas System Length: Carbine Length
Barrel Twist Rate: 1-7
Muzzle Device: A2 Flash Hider
Gun Model: AR-15
Condition: New
Gas Block Journal Size-Diameter: .750 in
Gun Type: Carbine
Gun Make: AR Platform
Magazine Included: No
Country of Origin: USA

Features of Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider

  • M4E1 Threaded Upper Receiver Features:
  • New enhanced forging that gives the upper receiver a inbillet lookin
  • 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
  • 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 oclock positions
  • Compatible with low profile gas blocks
  • 1.3 Inside diameter
  • 1.5 Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels
  • Learn More about our NEW ATLAS S-ONE Hanguards
  • 5.56 Nato 11.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
  • 5.56 NATO 20in Rifle Length
  • 1/7 twist
  • 4150 CrMoV
  • QPQ
  • gas port drilled
  • .750 gas block journal
  • Government Profile
  • Rifle length gas system
  • .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider

Package Contents:

  • Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider
  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS S-ONE Handguard of choice
  • 20in 5.56 Rifle Length CMV Barrel
  • Low Profile Gas Block and Rifle Length Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle

Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision M4E1-T Complete Upper Receiver, 5.56mm, 11.5in, Carbine Length, S-One M-LOK Handguard, Black, APAR712102M29 , MPN: APAR712102M29 , UPC: 840014616565 , Code: 29D-UFH-MJNY-APAR712102M29
  • Aero Precision M4E1-T Complete Upper Receiver, 5.56mm, 11.5in, Carbine Length, S-One M-LOK Handguard, FDE, APAR712112M29 , MPN: APAR712112M29 , UPC: 840014616572 , Code: 29D-UFH-MJNY-APAR712112M29
  • Aero Precision M4E1 Threaded Complete Upper Receiver, 5.56, 11.5in, Carbine Length, 1-7 Twist, 10.3in ATLAS S-ONE Handguard, A2 Flash Hider, Cerakote, OD Green, APAR700389M29 , MPN: APAR700389M29 , UPC: 840014618712 , Code: 29D-UFH-MJNY-APAR700389M29

Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Aero Precision Threaded Upper Receiver, M4E1, 5.56, 11.5 inch Barrel, 9 inch M-LOK ATLAS S-ONE Handguard, A2 Flash Hider, Anodized Black, APAR700302M29 , MPN: APAR700302M29-DEMO , Code: 29D-UFH-MJNY-APAR700302M29-DEMO
  • DEMO, Aero Precision M4E1 Threaded Complete Upper Receiver, 5.56, 11.5in, Carbine Length, 1-7 Twist, 10.3in ATLAS S-ONE Handguard, A2 Flash Hider, Cerakote, OD Green, APAR700389M29 , MPN: APAR700389M29-DEMO , Code: 29D-UFH-MJNY-APAR700389M29-DEMO
  • Aero Precision Threaded Upper Receiver, M4E1, 5.56, 11.5 inch Barrel, 9 inch M-LOK ATLAS S-ONE Handguard, A2 Flash Hider, Anodized Black, APAR700302M29 , MPN: APAR700302M29 , UPC: 815421027730 , Code: 29D-UFH-MJNY-APAR700302M29
  • Aero Precision Threaded Upper Receiver, M4E1, 5.56, 11.5 inch Barrel, 9 inch M-LOK ATLAS S-ONE Handguard, A2 Flash Hider, Flat Dark Earth, APAR700312M29 , MPN: APAR700312M29 , UPC: 815421027761 , Code: 29D-UFH-MJNY-APAR700312M29
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