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Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider Up to 10% Off — Free 2 Day Shipping w/ code 2DAYAIR — 2 models

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Aero Precision M4E1 Threaded 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver, Black, Flat Dark Earth, OD Green
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M48
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M48
Aero Precision M4E1 Threaded 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver, Black, Flat Dark Earth, OD Green
1 of 3 images
Aero Precision M4E1 Threaded 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver, Black, Flat Dark Earth, OD Green
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M48
2 of 3 images
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M48
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M48
3 of 3 images
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M48

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Questions & Answers
Does this come with the BCG? Manufacturer Answer

The BCG is not included and will need to be purchased separately.

by Aero Precision USA, Manufacturer, December 15, 2022
See 1 More Answer
I have a Colt CR6920. Will this exchange easily with the lower I currently have? I'm looking for a complete upper to exchange for my current one. Manufacturer Answer

As long as your Colt conforms to the current mil spec standards, then this upper is compatible.

by Aero Precision USA, Manufacturer, July 20, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review Exceeded expectations by Dan, Verified Owner, November 2, 2021
I bought 10.5 and have it suppressed. The rails are ported for gas release which makes a nice difference when shooting. Very high quality upper. Aero is essentially the best you can get with some of the “top” brands asking $1200 for an upper with 1 y...
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5/5 found this helpful
Helpful Positive Review Aero Precision 10.5 upper by Blake, February 10, 2019
This upper is exactly what you’d expect it to be. I got the Fde model and the coating on it is really tough and durable. When I received the upper I wasn’t sure if it came with the gen 1 or gen 2 upper receiver, wasn’t a big deal at all to me but it ...
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10/10 found this helpful
Helpful Positive Review Aero Precision by PRay, November 12, 2019
I recently ordered the Aero Precision 18" M4E1 complete upper. It was out of stock when I initially ordered it. Rob, the sales rep who worked with me, was amazing. He answered my questions and was helpful all through the process of ordering, resto...
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1/1 found this helpful
Helpful Positive Review Perfect & reliable for PDW build by GMS, Verified Owner, March 12, 2019
I run this upper on a Spikes lower (registered SBR) with Maxim PDW stock, a heavy JP captured buffer and an SLR linear hybrid comp. I run a Trijicon MRO on top. It runs like a charm. Brass throws at 3 o'clock. No massive concussion to the shoote...
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1/1 found this helpful
Helpful Positive Review Great Product - Worth the wait by Fellixx, Verified Owner, October 21, 2020
Had this on back order for the longest time but when I received this upper it exceeded my expectations. The fit and finish is first rate and they even included the custom wrench for the barrel nut. I would highly recommend this upper and would cert...
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1/1 found this helpful
Helpful Positive Review Aero 10.5 inch upper by nbhum, Verified Owner, February 19, 2020
Fantastic fde finish. High quality upper from aero you will not be disappointed. 10.5 inch barrel is a great length for an ar pistol build and fits my length of pull comfortably with a SBA3 brace. Add a vg6 break and you will be consistently staying ...
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1/2 found this helpful
Read All 20 Reviews
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Product Info for Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider

With this complete upper receiver, you can finish your new build with confidence that you can handle any situation or that you're over-equipped. Aero Precision built these AR Handguards & Barrels with their ATLAS S-ONE Handguard and 20in 5.56 Rifle length barrel for top-shelf quality. The handguard included with this Aero Precision Complete Upper Receiver w/ ATLAS S-ONE Handguard includes indexing grooves at the 12:00 position for positive grip control during shooting sessions. Also, the top rail on these uppers is cut from the center of the top rail, reducing the weight. There's a quick-disconnect sling socket at the 3:00 and 9 o'clock positions so that you can carry your rifle on your side or use a sling for added mobility. Complete your rifle build with this high quality Aero Precision M4E1 Threaded NATO w/ ATLAS S-ONE Handguard Complete Upper Receiver Package.image

Specifications for Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Cartridge: 5.56x45mm NATO
Overall Length: 30 in
Barrel Length: 20 in
Barrel Profile: Government
Gas System Length: Rifle Length
Barrel Twist Rate: 1-7
Muzzle Device: A2 Flash Hider
Gun Model: AR-15, M16
Condition: New
Fabric/Material: 4150 CrMoV
Gas Block Journal Size-Diameter: .750 in
Handguard Length: 15 in
Handguard Style: Hybrid Rail
Gun Rail: M-LOK
Gun Type: Rifle
Gun Make: Aero Precision, AR Platform
Included Accessories: None, Standard
Gas System Type: Proprietary
Weight: 70 oz

Features of Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider

  • 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
  • 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
  • Compatible with mil-spec AR15 upper receivers and barrels
  • 4150 CrMoV, QPQ, gas port drilled
  • .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider

Package Contents:

  • Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider
  • 5.56 CMV Barrel (Carbine Length)
  • Low Profile Gas Block
  • Carbine Length Gas Tube

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Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M48 , MPN: APAR700305M48 , Code: 29D-UFH-M4E1T55620-APAR700305M48
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M48 , MPN: APAR700315M48 , Code: 29D-UFH-M4E1T55620-APAR700315M48

Aero Precision M4E1 Threaded 20in 5.56 w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

DEMO, Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M48 , MPN: APAR700305M48-DEMO , Code: 29D-UFH-M4E1T55620-APAR700305M48-DEMO
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in KeyMod ATLAS S-ONE Handguard, Anodized Black, APAR700205P48 , MPN: APAR700205P48 , Code: 29D-UFH-M4E1T55620-APAR700205P48
Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in KeyMod ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700215P48 , MPN: APAR700215P48 , Code: 29D-UFH-M4E1T55620-APAR700215P48
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