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Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider Up to 10% Off w/ Free S&H — 5 models

Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth Cerakote, Anodized Black, APAR700314M14
Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 16in, 1-7 Twist, A2 Flash Hider, 5/8x24 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700705M14
Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver, Black, Flat Dark Earth
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14
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Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth Cerakote, Anodized Black, APAR700314M14
2 of 5 images
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth Cerakote, Anodized Black, APAR700314M14
Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 16in, 1-7 Twist, A2 Flash Hider, 5/8x24 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700705M14
3 of 5 images
Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 16in, 1-7 Twist, A2 Flash Hider, 5/8x24 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700705M14
Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver, Black, Flat Dark Earth
4 of 5 images
Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver, Black, Flat Dark Earth
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14
5 of 5 images
Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14

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Questions & Answers
How much does this 16” upper weigh? Also does it matter about the postal or carbine gas tube? I’m putting it on a bushmaster lower. Expert Answer

The weight of the Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Uppers are 53oz for the 12" handguard models and 55oz for the 15" handguard models. These uppers come with a gas tube and will work on a Bushmaster AR15 lower if it is Mil-Spec.

by Hunter, Gear Expert, November 30, 2022
Will this upper receiver fit a Ruger Ar556 lower? Expert Answer

Yes, the Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver will fit to your Ruger AR556 lower receiver and function as intended. This upper does not include a BCG or charging handle, you can use any 5.56 BCG and charging handle.

by Ethan, Gear Expert, August 3, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Nice accurate upper optics planet fast shipping by A Tanner, April 30, 2022
Shoots great looks great highly recommend. Of the three different brands I have aero psa and bushmaster this one is in the middle. Better than psa but not as good as the bushmaster but I will say any difference is slight.
2/2 found this helpful
Helpful Positive Review
.300 Blackout by Owen, August 23, 2020
Nice upper shoots very good with the Vortex spitfire I put on it. Would buy again if had another lower to put on it. Also the fit and finish on Aero products are very nice so was easy to assemble & get ready to shoot.
3/3 found this helpful
Most Recent Reviews
Great complete upper by Olesilver, Verified Owner, November 6, 2025
Great upper without a top rail to have to cover uo or to get in the way. Nice flash hider. Smooth build with an Aero Precision lower.
Most Recent Reviews
Aero, synonymous with perfection by Richard, Verified Owner, February 14, 2025
I was debating on whether I should get a stand alone .300 rifle or an upper for a long while. I’ve had an unused lower for a while and eventually decided on this upper, and I’m glad I did. Initially I had a few failures to feed, but with a little CLP...
Read More...
Most Recent Reviews
Smooth and Easy Baby by Johnny Bravo, Verified Owner, November 13, 2024
Slick look and quick put together! The Bronze look with black really stands out.
Most Recent Reviews
Aero Precision Complete Upper 300 BLK by jquick80, April 12, 2024
Absolutely love this upper. The ATLAS hand guard is one of the best I’ve had. Super fast shipping from Optics Planet as always!!!! Highly recommend
Read All 10 Reviews
5 Models Available
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Product Info for Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider

Complete your rifle build with this reliable Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver. Aero Precision built these AR15 Upper Receivers with their ATLAS S-ONE Handguard that has a slim profile while maintaining the stability and strength you need. This Aero Precision M4E1 Threaded 16in .300 Blackout Complete Upper Receiver comes with a front and rear picatinny rail, and you get a low profile gas block and pistol length gas tube for reliable performance. Customize your gun with the parts and accessories you need to match your build. This Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver includes a forward assist and port door already installed.image

WARNING: California`s Proposition 65

Specifications for Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Caliber: .300 AAC Blackout
Overall Length: 26 in
Barrel Length: 16 in
Barrel Profile: DRP
Gas System Length: Pistol Length
Barrel Twist Rate: 1-7
Muzzle Device: A2 Flash Hider
Gun Model: AR-15
Condition: New
Gun Type: Rifle
Gun Make: AR Platform
Included Accessories: None
Weight: 48.5 oz
Magazine Included: No
Country of Origin: USA

Features of Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with 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
  • Barrel Features:
  • Chamber: .300 Blackout
  • Length: 16in
  • Material: 4150 Chome Moly Vanadium
  • Finish: QPQ Corrosion Resistant Finish
  • Gas System Length: Pistol
  • Gas Block Journal: .750in
  • Twist Rate: 1:7 Inches
  • Muzzle: 5/8x24 Threaded
  • Weight: 29oz
  • Other; M4 Feed Ramp Extension
  • HP and MPI Tested
  • Standard A2 Flash Hider
  • Included Accessories:
  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS S-ONE Handguard of choice
  • 16in .300 Blackout CMV Barrel
  • Low Profile Gas Block and Pistol Length Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle
  • These products may be selected as add-ons under the FINISH YOUR BUILD tab

What firearm models does the manufacturer say Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider is compatible with?

The manufacturer says that Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider is compatible with AR-15

Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M14 , MPN: APAR700304M14 , Code: 29D-UFH-M4E1T30016-APAR700304M14
  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth Cerakote, Anodized Black, APAR700314M14 , MPN: APAR700314M14 , Code: 29D-UFH-M4E1T30016-APAR700314M14
  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M14 , MPN: APAR700305M14 , UPC: 840014601820 , Code: 29D-UFH-M4E1T30016-APAR700305M14
  • Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 16in, 1-7 Twist, A2 Flash Hider, 5/8x24 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700705M14 , MPN: APAR700705M14 , UPC: 840014602643 , Code: 29D-UFH-M4E1T30016-APAR700705M14
  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M14 , MPN: APAR700315M14 , Code: 29D-UFH-M4E1T30016-APAR700315M14

Aero Precision M4E1 Threaded 16in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in KeyMod ATLAS S-ONE Handguard, Anodized Black, APAR700204P14 , MPN: APAR700204P14 , UPC: 840014601769 , Code: 29D-UFH-M4E1T30016-APAR700204P14
  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 15in KeyMod ATLAS S-ONE Handguard, Anodized Black, APAR700205P14 , MPN: APAR700205P14 , Code: 29D-UFH-M4E1T30016-APAR700205P14
  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 12in KeyMod ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700214P14 , MPN: APAR700214P14 , Code: 29D-UFH-M4E1T30016-APAR700214P14
  • Aero Precision Complete Upper Receiver, M4E1-T, .300, 16in, Blackout Barrel, 15in KeyMod ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700215P14 , MPN: APAR700215P14 , UPC: 840014601813 , Code: 29D-UFH-M4E1T30016-APAR700215P14
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