M4E1 Enhanced 18" .223 Wylde Complete Upper Receiver

Aero Precision 18" .223 Wylde Complete Uppers

M4E1 Enhanced 18" .223 Wylde Complete Upper Receiver Product Sku: APPG600231P42

This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced milling design for grip and visual appeal and a new profile for the picatinny top rail.


  • M4E1 Enhanced Assembled Upper Receiver
  • Enhanced Handguard of choice
  • 18" .223 Wylde Rifle Length Stainless Steel Barrel
  • Low Profile Gas Block and Rifle Length Gas Tube
  • Product comes assembled
  • Thie complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tab

M4E1 Upper Features:

  • Forged from 7075 T6 aluminum
  • Precision machined to M4E1 specs
  • M4 feedramps
  • Matte black hard coat anodized Mil 8625 Type 3 Class 2
  • Laser engraved T-marks (Anodized only)
  • Comes assembled, with port door and forward assist installed
  • Accepts standard AR15/M16 components
  • Handguard mounting platform is forged into the receiver
  • Works with Aero Precision handguards but also fits most BAR-system handguards
  • Barrel nut and wrench are included

Gen 2 Enhanced Handguard Features:

  • 1pc free float design
  • Built in anti-rotation tabs
  • Scalloped rails
  • Continuous top rail
  • 1.78" inside diameter fits most muzzle devices and 1.5" suppressors
  • Compatible with low profile gas blocks
  • Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o’clock positions
  • Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal
  • Gen 2 Feature - New profile for the continuous picatinny top rail

18" .223 Stainless Steel Rifle Length Barrel Features:

  • .223 Wylde 18" Rifle Length Barrel, 1/8 Twist
  • 416R Stainless Steel
  • Bead Blasted Finish
  • .750 gas block journal
  • Rifle length gas system
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider
Made In America? Yes
Platform AR15
Series M4E1
Caliber .223 Wylde
Barrel Length 18"
Weight(s) 15" KeyMod - 68.16 oz / 15" M-LOK - 68.16 oz / 15" Quad Rail - 71.04 oz
Other No

Customer Reviews

10 Item(s)

I don't normally write reviews, but It became a moral obligation to give credit where it is most deserving. I put a Vortex Spitfire 3x and took it out to the range. It consistently shoots 7/8in or better. My smallest group for the day was a 7/16in group. For some this might not seem like a note worthy feat. But limited to 3x for magnification I felt this was nothing short of outstanding. A 10x or 12x scope would probably dial that in considerably. I personally have recommended this upper to many, and will be back to buy several more in varying calibers. There isn't another complete upper on the market that matches the quality for this price. (Posted on 10/7/2017)
very well made. ((worth every $)) Review by Carlos
looks amazing. This upper did not disappoint either. Great fit and finish. she's a beauty with VG6 EPSILON with same finish the barrel BBSS. to bad I cant attach pic to this review. (Posted on 6/23/2017)
One of the best uppers ever bought Review by Somguy-_-
I been looking for a wylde chamber upper for a long while. After doing research to the point of madness, decided on this unit.
This complete upper slapped on my spikes lower puts a tighter group at 500 yards than my BCM ss410 20", with a grouping of 1.3125". I put about 90 round though this upper and its a thing of beauty. I will be back for my future needs.
Please note my first cleaning of this upper after being unwrapped. Was one of the dirtiest barrels/chambers I have ever seen in any new gun. Also note this is 1/2 of cost of my BCM upper!!! (Posted on 5/6/2017)
Best Upper for your money. Review by John
I ordered this upper in March and am very pleased with it. It was very accurate and just felt really good in my hands. Could not be happier with this upper. I can't wait until I have enough money to buy another one in 300 black out. (Posted on 4/19/2017)
Awesome Review by Spencer
Installed this in my lower and mounted scope. It is shooting 1" gross without even a box of bullets through it yet. I live it. Great purchase with fear shipping. (Posted on 1/7/2017)
Outstanding upper! Review by justin
I purchased this upper for an SPR build and liked the fact that the barrel is already cut for the Ops inc 12th/ AEM5 suppressor collar. My first trip out to the range went like this:
After following Ballistic Advantage's break in procedure I shot a 10 shot group @100yds using IMI 77gr OTM and was immediately impressed that came in at just under 1 inch. I had several other 5 shot groups @100yds measuring as small as .65"! At 200yds I had multiple 5 shot groups measure right aroUnd 1.5". I can't wait to start ringing this gun out at further distances.

The only reason I gave it 4 stars is the set screw that holds the dust cover rod in place was not installed on my upper, which caused the rod to slide forward and out of the pocket on the rear. No big deal as it didn't impede function and Aero was very prompt at helping me get this resolved. (Posted on 10/27/2016)
Quick and easy to the point period. Review by Willard
In under an hour the build was complete. 20 minutes later using 77 grain match kings I was literally shooting groups under a quarter using lucid Glass at 200m. This is the best by far the best deal you are ever going to find at this price point. I've literally spent twice the amount for much less do yourself a favor stop shopping and buy now (Posted on 8/27/2016)
Really nice complete upper. Review by Joe
Purchased this upper after completing an Aero 16" 223 Wylde build for a friend. At the range it was shooting dime sized groups at 100. This upper did not disappoint either. Great fit and finish. The enhanced upper is really easy to assemble. (Posted on 4/21/2016)
Excellent product Review by Brent
This upper puts 69 grain Matchkings into little tiny groups. Great value! (Posted on 2/3/2016)
Awesome Upper! Review by coyote hunter
After looking a few different websites/brands I saw an add for these guys so i decided to check it out. it was actually below what my "budget" was going to be which was a plus. i got it in and put it on my lower and haven't looked back since. it has been very accurate and good finish. couldnt be happier! p.s after bragging about it at work a buddy i work with ended up buying the exact same upper! cant go wrong. (Posted on 1/28/2016)

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