M4E1 8" .300 Blackout Complete Upper Receiver

Aero Precision 8" .300 Blackout Complete Uppers

M4E1 8" .300 Blackout Complete Upper Receiver Product Sku: APPG600211P1

This Upper Receiver Handguard Combo now 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 Assembled Upper Receiver
  • Enhanced Handguard of choice
  • 8" .300 Blackout CMV Barrel
  • Low Profile Gas Block and Pistol Length Gas Tube
  • Product comes assembled
  • This assembly 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
  • 1.8" 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

8" .300 Blackout Barrel Features:

  • Length: 8"
  • Twist: 1 in 7
  • Muzzle: 5/8x24 Threaded
  • Material: 4150 Crome Moly Vanadium
  • Finish: QPQ corrosion resistant finish both inside and out
  • Gas Block: .750
  • Gas Port: .109
  • Gas System Length: Pistol
  • Weight: 18oz
  • M4 Barrel Extension
  • HP and MPI Tested
Made In America? Yes
Series M4E1
Chamber .300 Blackout
Barrel Length 8"
Weight(s) KeyMod: 39.04 oz / M-LOK: 39.04 oz / Quad Rail: 40 oz

Customer Reviews

3 Item(s)

Excellent product Review by Mark
Finish on this upper is excellent! The fit and function are awesome, this upper has worked flawlessly for me. AERO IS AWESOME! (Posted on 2/9/2016)
Incredible Value, High Quailty Review by Bill
I initially tried to buy an AAC SBR upper, but fortunately I could never had find an AAC in stock and bought an Aero Precision instead. Not only dd I save $300-$400, the Quailty of my Aero Precision is perfect. I just received my stamp and the upper ran perfectly with both supersonic and subsonic ammo. Highly recommended! (Posted on 8/17/2015)
Excellent Review by Michael
Excellent quality and craftsmanship. SBR runs awesome. I cannot wait to build an AP .308. Great job AP (Posted on 6/18/2015)

3 Item(s)

Write Your Own Review

Only registered users can write reviews. Please, log in or register

Finish Your Build