M4E1 Enhanced 16" .223 Wylde SS Complete Upper Receiver

Aero Precision 16" .223 Wylde Complete Uppers

M4E1 Enhanced 16" .223 Wylde SS Complete Upper Receiver Product Sku: APPG600231P9

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
  • 16" .223 Wylde Stainless Steel Barrel
  • Low Profile Gas Block and Mid 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

16" .223 Stainless Steel Mid-Length Barrel Features:

  • .223 Wylde 16" Mid Length Barrel, 1/8 Twist
  • 416R Stainless Steel
  • Bead Blasted Finish
  • .750 gas block journal
  • Mid 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 16"
Weight(s) 12" KeyMod - 53.12 oz / 12" M-LOK - 53.12 oz / 12" Quad Rail - 55.36 oz / 15" KeyMod - 54.72 oz / 15" M-LOK - 54.72 oz / 15" Quad Rail - 57.28 oz
Other No

Customer Reviews

8 Item(s)

Absolutely incredible Review by Jake
I purchased a complete upper with the 15" MLOK hand guard through Aero, along with their nickel boron BCG. As this was a part of my first AR "build", I had very high expectations. Aero Precision didn't just meet them, they exceeded them. First of all, fit and finish is impeccable. Not a single flaw. Beautiful components and materials made for a great look. But all that aside, put on top of a Palmetto State lower with a Geissele trigger, this gun is more accurate than I am. It is perfect for the range, perfect for small game hunting, and perfect for anyone looking for the best "bang for the buck" like I was. I've never touched anything from Aero until purchasing this upper, but I will certainly be looking to them in the future. (Posted on 8/7/2017)
When this Upper is ON SALE! Review by Drew
You gotta get one. Fit & Finish is top quality. Nice fit on a different mfg lower. SS Barrel and Handguard is Still Lighter than my other carbine length Quad Rail. No issues with Key-Mod. The parts you need are available. NOT GOING TO FIND A BETTER UPPER VALUE, WHEN IT'S ON SALE. (Posted on 8/4/2016)
Great Buy Review by Kent
Great looking upper. Nice fit on my AP lower, no slack. Well packaged. Only complaint is the long wait and poor shipping notification process at AP. Received an email stating "order complete", but did not receive the upper for almost 10 additional days. Didn't receive a tracking email until I called. Customer service was very good once I got in contact with them. (Posted on 8/3/2016)
awesome Review by Abraham
For starters, very beautiful in its looks, and very solid build. So beautiful, im almost scared to shoot it alot......but I do it anyway. Very light weight, even with my vortex 1-4×24. Broke in nicely, with bcg, runs very smooth. Ran both 223 and 556 at 100 yards and holding 1 inch group for now. Flip sights almost feels just as good. Love the color, the finish, the build, the accuracy, the ss wylde barrel. I ordered a 16" upper from a few other places a few months ago and they where absolutely horrible products and service. Aero precision you made up for that more than you know. Thanks for the great customer service and product this is where I'll be ordering from (Posted on 5/9/2016)
Accurate, Light Weight (w 15" Key-Mod) Review by Drew
Picked up 1 of these w SS Barrel, and 15" Hand-guard. Excellent quality, and feel. This is spot on, but really love the feel. Lighter than my carbine.
Think the enhanced upper connection is awesome. (Posted on 4/20/2016)
Excellent Review by Jason
You can't beat this complete upper for the price. The stainless 223 Wylde barrel shoots excellent. The groups at 200 and 300 yards off a bench are great. (Posted on 3/12/2016)
Awesome Components Review by Christian
Being on a tight budget but being incredibly particular about my build the AP upper was a perfect fit for what I wanted at an awesome price. Everything I was looking for: 16" Mid Length .223 Wylde with quality barrel and slim profile free float hand guard all for way less than anywhere else I could find it among the few offerings in that configuration. I went with the 12" MLOK in black and sitting nice and tight on an AP built Palmetto State Armory lower with a Vortex Strike Eagle in the AP SPR mount. When I do my part I'm getting 1 MOA groups and I haven't even upgraded the mil-spec trigger. You'd have to spend at least 2x the money to match it anywhere else. Very proud of my AP build, even if I had way more money to spend on it I would have still gotten the AP upper and only upgraded the trigger, charging handle and put the rest into the scope. All of which I can do in the future! (Posted on 2/19/2016)
Pretty Damn Sweet Review by Hwydog
Had a AP lower sitting around and wanted to make a complete rifle out of it. Opted for the quad rail 15" Wylde complete upper receiver. It mated quite nicely with the lower. A nickle boron bolt from AP was added and fit precisely into the upper. To finish it off, a VG6 Gamma and CAGE was on the business end of the barrel. The accuracy, fit and polish of AP products in my complete AP rifle makes it the best I've put together so far. (Posted on 11/13/2015)

8 Item(s)

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