+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Q&A for Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider — 18 Questions & 14 Answers

Name Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver w/ A2 Flash Hider (4.8)
As Low As $368.99 Save Up to 21%
View Product
Write a Review
Please keep questions related to the product! If you have questions regarding availability, pricing, or shipping options for this item, please contact our customer service team.
Need an answer right now?
Contact us!
Continue As a Guest
Saving...
Sign In or Create an Account (optional)
or Register
Why use an OpticsPlanet.com account for my questions and answers?

Having an account with OpticsPlanet.com makes writing questions and answers even better! We’ll save all of your questions and answers in your account, provide you easy access to them, so you can see how the community has responded.

If you’d like to add a question without creating an account, you can proceed with filling out the fields on this form.

Show
Sort by
Filter by
Q
dtkmrp, member, from AZ, United States, asked on June 10, 2020

Barrel manufacturer?

A
Answered by Bob, member, from FL, United States, on April 17, 2021

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.

2 of 2 found the following answer helpful.
Was it helpful to you? Yes | No
Share
View 1 More Answer Submit Your Answer
Q
Romeo Valdez, member, from CA, United States, asked on December 06, 2024

Hello, Does upper receiver include Bcg and charging handle?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on December 06, 2024

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.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Chris, member, from CO, United States, asked on October 17, 2024

Is this gas block adjustable?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on October 18, 2024

The Aero Precision M4E1 Threaded 11.5in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver does not feature an adjustable gas block.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Bud, member, from AR, United States, asked on February 09, 2022

On these <16" uppers, why doesn't OP just call them "pistol uppers" or "short-barreled rifle restrictions apply"? Might avoid unnecessary confusion.

Manufacturer Answer
A
Answered by Aero Precision USA, Manufacturer from WA, United States, on February 25, 2022

Best for customers to reach out to their local FFL to confirm their state/local laws prior to making purchases. Aero Precision Ultralight 30mm Scope Mount, Extended

1 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
UncleDano, member, from UT, United States, asked on October 04, 2021

What type of BCG comes with this upper?

Expert Answer
A
Answered by Alex O., Gear Expert, from IL, United States, on November 17, 2021

This complete upper does not include BCG or Charging Handle.

1 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
UncleDano, member, from UT, United States, asked on October 04, 2021

This is a 11" barrel, but it states in the details: "20in 5.56 Rifle Length CMV Barrel" "Low Profile Gas Block and Rifle Length Gas Tube"

Expert Answer
A
Answered by Alex O., Gear Expert, from IL, United States, on November 17, 2021

This is a 5.56 Nato 11.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
David Villegas, member, from NC, United States, asked on April 20, 2021

Does this come with a bcg?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 05, 2021

Bolt carrier group is not included.

1 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
K, member, from WA, United States, asked on March 08, 2021

Is the A2 muzzle device pinned and welded, or is it removable?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 05, 2021

The muzzle device is not pinned and welded, it is removable.

2 of 2 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Human, member, from VA, United States, asked on October 07, 2020

Will the m4e1 upper fit a standard mill spec lower?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 05, 2021

Yes, they will fit a standard mil-spec AR15 lower receiver.

1 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Jay, member, from OH, United States, asked on September 03, 2020

Does this have a carbine gas system

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on May 05, 2021

Yes, this has a carbine length gas system.

2 of 2 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer