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Questions & Answers
M4E1-T. What does the "T" means? Expert Answer

Unfortunately the manufacturer dose not provide this information, i would recommend reaching out to Aero directly.

by Patrick, Gear Expert, November 4, 2021
12.5" Is a Pistol right? Expert Answer

Yes, any barrel length under 16" is considered a pistol/sbr depending on Tax stamp status

by Patrick, Gear Expert, October 1, 2021
Customer Reviews
Helpful Positive Review AERO PRECISION 12.5” upper by nate, September 29, 2022
The best upper you can get for the money. Aero makes awesome stuff. the hand guard is the slimmest i’ve ever seen. paired it up with an eotech 512 and was hitting at 250 yards standing. also very light weight. firm believer in aero precision now
3/3 found this helpful
Helpful Positive Review Aero upper by B, December 14, 2022
I bought this upper and it ended up later getting the lower to match. I took advantage of the black friday deals and it came pretty quick. Ive put a couple hundred rounds through it with zero issues. It shot steel and brass ammo eith no problems. The...
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1/1 found this helpful
Helpful Positive Review who cares if u missed the sale get it by Robert Shivers, Verified Owner, August 13, 2023
You won’t regret it look at Texas troop review for this product he has the energy I do not. lol I as well have the 12.5 w psa blemish lower. Some times I’ll use psa lower with magpul fixed stock it’s a tad bit heavier right at the shoulder placement ...
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1/1 found this helpful
Helpful Positive Review Premium upper by Texas Troop, Verified Owner, July 26, 2020
I’ve owned multiple different brands of AR15 uppers over the years including; Colt, BCM, Palmetto State Armory, Daniel Defense and Rock River. This Aero Precision upper is my favorite. It is both aesthetically and functionally awesome!!! The rail is ...
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9/9 found this helpful
Helpful Positive Review Perfect fit great price by Ammoman, October 22, 2022
Cheapest price for this item I can fined anywhere. Super Fast shipping for free. Awesome site. Keep up the great work. Wish it came as a complete completed upper. Official looking and the weight isn’t bad.
3/3 found this helpful
Helpful Positive Review Great upper by Phil, August 14, 2021
The Atlas S One hand guard is something special. I love the missing picatinny rail section. Makes it very easy to get a nice grip with a comfortable thumb over bore. Only have put around 120 rounds through it but it is extremely accurate and very lig...
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2/2 found this helpful
Read All 16 Reviews
Caliber: 5.56x45mm NATO Barrel Length: 12.5 inGas System Length: Carbine Length Barrel Twist Rate: 1-7 Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: M4 Condition: Factory DEMO Attachment Type: Picatinny Gun Rail: M-LOK Gun Type: Rifle Country of Origin: USA Mount Type: Picatinny

Code: 29D-UFH-AEUPATLS-APAR700304M30-DEMO

MPN: APAR700304M30-DEMO

Product No Longer Available

Product Info for Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ S-One Handguard

This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to 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.image

Features of Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ S-One Handguard

  • M4E1 Threaded Upper Receiver 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
  • 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 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
  • Learn More about our NEW ATLAS S-ONE Hanguards
  • 12.5" 5.56 CMV Carbine Length Barrel Features:
  • Chamber: 5.56
  • Length: 12.5"
  • Twist: 1 in 7
  • Threading: 1/2"x28
  • Material: Chrome Moly Vanadium
  • Finish: QPQ corrosion resistant finish both inside and out
  • Gas Block: .750
  • Gas System Length: Carbine
  • Weight: 22oz
  • M4 Barrel Extension
  • HP and MPI Tested

Package Contents:

  • Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ S-One Handguard
  • Includes:
  • M4E1 Threaded Assembled Upper Receiver
  • 12" M-LOK ATLAS S-ONE Handguard
  • 12.5" 5.56 Government Profile CMV Barrel Carbine Length
  • Low Profile Gas Block and Carbine Length Gas Tube
  • AR15 A2 Birdcage Flash Hider

Gun Triggers

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Magazine and Accessories

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Gun Sights

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Gun Parts and Accessories

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Firearm Case

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Gun Stocks

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Airsoft Gun Accessories

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Related Products to Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ S-One Handguard

Aero Precision M4E1-T 12.5in 5.56 NATO Complete Upper Receiver with Flash Hider w/ S-One Handguard Unavailable & Discontinued Models

List of Unorderable Models

DEMO, Aero Precision Complete Upper Receiver M4E1-T, 5.56 NATO, 12.5in CMV Barrel, Carbine Length w/ 12in M-LOK ATLAS S-ONE Handguard, Anodized, Black, APAR700304M30 , MPN: APAR700304M30-DEMO , Code: 29D-UFH-AEUPATLS-APAR700304M30-DEMO
Aero Precision Complete Upper Receiver M4E1-T, 5.56 NATO, 12.5in CMV Barrel, Carbine Length w/ 12in M-LOK ATLAS S-ONE Handguard, Anodized, Black, APAR700304M30 , MPN: APAR700304M30 , UPC: 815421028669 , Code: 29D-UFH-AEUPATLS-APAR700304M30
Aero Precision Complete Upper Receiver M4E1-T, 5.56 NATO, 12.5in CMV Barrel, Carbine Length w/ 12in M-LOK ATLAS S-ONE Handguard, FDE, APAR700314M30 , MPN: APAR700314M30 , UPC: 815421028652 , Code: 29D-UFH-AEUPATLS-APAR700314M30
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