M5E1 Enhanced 20" .308 Stainless Steel Complete Upper Receiver

Aero Precision M5E1 20" Stainless Steel Complete Uppers

M5E1 Enhanced 20" .308 Stainless Steel Complete Upper Receiver Product Sku: APPG308534P34

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.


  • M5E1 Assembled Upper Receiver
  • Gen 2 Enhanced Handguard of choice
  • 20" .308 Rifle Length Stainless Steel Barrel
  • Low Profile Gas Block and Rifle Length Gas Tube
  • Product comes assembled
  • This complete upper does not include a BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tab.

M5E1 Upper Features:

  • Forged from 7075 T6 aluminum
  • Precision machined to our specs
  • M4 feedramps
  • Laser engraved T-marks (Anodized only)
  • .2795” takedown pin holes
  • Accepts standard AR .308 components
  • Comes with forward assist and port door installed
  • Handguard mounting platform is forged into the receiver

NEW Gen 2 Enhanced Handguard Features:

  • Added quick disconnect sling socket at the 3, 6 and 9 o’clock positions
  • Milled additional surfaces along flats to aid with gripping and add visual appeal
  • New profile of the Picatinny Top Rail
  • 1pc free float design
  • Rail is Machined from 6061-T6 Aluminum
  • 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

20" .308 Stainless Steel Barrel Features:

  • Twist: 1 in 10
  • Threading: 5/8 x 24
  • Material: 416R Stainless Steel
  • Finish: Bead Blasted
  • Gas Block Journal: .750"
  • Gas System Length: Rifle
  • Weight: 54.24oz
  • DPMS Barrel Extension
  • HP and MPI Tested
Made In America? Yes
Platform M5
Series M5E1
Caliber .308 Winchester
Barrel Length 20"
Weight(s) 12" KeyMod: 86.13 oz / 12" M-LOK: 86.13 oz / 12" Quad Rail: - / 15" KeyMod: 88.03 oz / 15" M-LOK: 88.03 oz / 15" Quad Rail: -
Other No

Customer Reviews

5 Item(s)

Have 16” and 20” Review by Ryan
I originally purchased this upper in the 16” version and liked it so much I decided I’d try the 20” in order to see how much further I could reach out and touch something. Haven’t had a chance to get out to the long distance range but the quality is top notch and it marries perfectly with the Aero M5 lower. (Posted on 5/1/2018)
Great upper! Review by Brad
Out of the box and during barrel break in, it was holding sub MOA groups with various bullets. Surprisingly, it really likes a Sierra 165gr GameKing bullet being pushed with IMR 4895. It also likes the Hornady ELD-x 178 gr. :) Very pleased with this upper. (Posted on 11/1/2016)
Very Pleased Review by lee
Finish on this upper receiver was well executed. Fit was snug on my DPMS Gen. 1 lower. Functioned flawlessly using 168 grain Noslers with new Winchester cases. Could not be happier. Plan on being a regular customer. (Posted on 10/1/2016)
Great Value Review by TheRealStubot
I believe this assembly is the best deal in DPMS patterned 308 uppers. I can find nothing wrong with it. It fits tight to my lower, is perfectly finished, is light weight, and even while breaking it in, I'm getting 1.25moa. It is solid, appears to be perfectly gassed, and the stainless barrel looks sweet. (Posted on 4/6/2016)
love it Review by Roger
Just went and shot it. Love it great quality great price and I can't say enough for the great people ay aero precision. (Posted on 12/25/2015)

5 Item(s)

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