M4E1 10.5" 5.56 Complete Upper Receiver w/ Pinned FSB

Aero Precision 10.5" 5.56 w/ FSB Complete Uppers

M4E1 10.5" 5.56 Complete Upper Receiver w/ Pinned FSB Product Sku: APPG600211P3

All options are currently out of stock



  • M4E1 Assembled Upper Receiver
  • Enhanced Handguard of choice
  • 10.5" 5.56 Carbine Length CMV Barrel
  • Pinned FSB and Carbine Length Gas Tube
  • Product comes assembled
  • This 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
  • 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

Enhanced Handguard Features:

  • 1pc free float design
  • Rail is Machined from 6061-T6 Aluminum
  • 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

10.5" Barrel w/ Pinned FSB Features:

  • 5.56 Nato, 10.5" carbine gas, 1/7 twist, 4150 CrMoV, with F marked FSB taper pin
  • .750 gas block journal
  • Carbine gas system
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Weight: 34 oz
  • Front sight block comes stripped, no sight post or sling swivel
  • Standard A2 flash hider
Series M4E1
Chamber 5.56 NATO
Barrel Length 10.5"
Weight(s) -

Customer Reviews

3 Item(s)

Great upper! Great price! Review by Miguel
First off... Thank you Aero_ Precision for the 10% military discount.
The upper is great, it fits great on my build lower receiver. Great shooting and accuracy. I highly recommend this upper for anyone building a short-length AR-15. (Posted on 2/23/2016)
Great product Review by David
I got my upper when it went on sale. What a great deal and the quality is top notch. Can't wait for my lower to get here in a few days. I will be getting another in 300 black out as soon as this build is complete. A++ (Posted on 11/13/2015)
Great value! Review by Will
For the money you can't beat it! (Posted on 9/20/2015)

3 Item(s)

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