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Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider Up to 10% Off w/ Free Shipping — 3 models

Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3
Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EQ-7 HG Gen 2, FDE Cerakote, APAR640212Q3
Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EM-7 HG Gen 2, FDE Cerakote, APAR640212M3
Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver, Black, Flat Dark Earth
Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3
Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3
1 of 5 images
Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3
Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EQ-7 HG Gen 2, FDE Cerakote, APAR640212Q3
2 of 5 images
Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EQ-7 HG Gen 2, FDE Cerakote, APAR640212Q3
Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EM-7 HG Gen 2, FDE Cerakote, APAR640212M3
3 of 5 images
Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EM-7 HG Gen 2, FDE Cerakote, APAR640212M3
Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver, Black, Flat Dark Earth
4 of 5 images
Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver, Black, Flat Dark Earth
Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3
5 of 5 images
Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3

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Questions & Answers
Who makes the barrel? and what are the barrel specs? Expert Answer

The barrel is manufacturer by Aero Precision. The specifications are as listed on our site:


Caliber: 5.56 NATO
Barrel Length: 10.5 in
Handguard Length: 7 in
Handguard Style: Quad Rail
Gun Make: Aero Precision
Gun Model: AR15, AR-15
Additional Features: Continuous Top Rail, Scalloped Rails, Feed Ramp Extension, Anti-Rotation Tabs

by Tiffany S., Gear Expert, November 1, 2019
See 2 More Answers
Can i order this with the FSB not installed? Manufacturer Answer

Yes, here is the link upper receiver that features a Low Profile Gas Block:
https://www.opticsplanet.com/aero-precision-m4e1-complete-upper-5-56-rifle-barrel.html

by Aero Precision USA, Manufacturer, February 11, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
its a pretty great upper. by Dan, Verified Owner, May 12, 2025
I run this on a spike tactical lower, with a super safety installed. This upper handles it flawlessly, be it semi auto, or super safe. Never have any issues with it.
1/1 found this helpful
Helpful Positive Review
Really nice to have the FSB with the free float by Mo Guns, Verified Owner, May 4, 2021
I think this is the first upper Aero has made that has incorporated the FSB but also a M-lok and free-float rail rather then have the drop-in hand guards. Just looks better and feels better, a little more secure for attachments. I really like the loo...
Read More...
7/7 found this helpful
Helpful Negative Review
Partial picatinny rail version poorly designed by Vicious, December 22, 2023
No good way to configure the partial rail version with light / laser and switches. Not enough rail space to accommodate a good forward grip with any device attached. Don’t waste your money on this version. Get the mlock instead. This was a bad idea.
1/19 found this helpful
Read All 3 Reviews
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Product Info for Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider

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. Anti-Rotation Tabs. Feed Ramp Extension. Scalloped Rails. Continuous Top Rail.image

Specifications for Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Caliber: 5.56x45mm NATO
Barrel Length: 10.5 in
Muzzle Device: A2 Flash Hider
Gun Model: AR-15
Handguard Length: 7 in
Magazine Included: No
Condition: New
Country of Origin: USA

What firearm models does the manufacturer say Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider is compatible with?

The manufacturer suggests that Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider is compatible with AR-15

Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EQ-7 HG Gen 2, FDE Cerakote, APAR640212Q3 , MPN: APAR640212Q3 , UPC: 815421022643 , Code: 29D-UFH-M4E1CBFS-APAR640212Q3
  • Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211Q3 , MPN: APAR640211Q3 , UPC: 815421022520 , Code: 29D-UFH-M4E1CBFS-APAR600211Q3
  • Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EM-7 HG Gen 2, FDE Cerakote, APAR640212M3 , MPN: APAR640212M3 , UPC: 815421022568 , Code: 29D-UFH-M4E1CBFS-APAR640212M3

Aero Precision M4E1 10.5in 5.56 Barrel w/ FSB Complete Upper Receiver with Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EM-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211M3 , MPN: APAR640211M3-DEMO , Code: 29D-UFH-M4E1CBFS-APAR600211M3-DEMO
  • Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EK-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211P3 , MPN: APAR640211P3 , Code: 29D-UFH-M4E1CBFS-APAR600211P3
  • Aero Precision Complete Upper Receiver, M4E1, 10.5in, 5.56 Barrel w/ FSB, EK-7 HG Gen 2, FDE Cerakote, APAR640212P3 , MPN: APAR640212P3 , UPC: 815421022605 , Code: 29D-UFH-M4E1CBFS-APAR640212P3
  • Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EM-7 HG, No BCG/Charging Handle, Anodized Black, 10.5in, APAR600211M3 , MPN: APAR640211M3 , UPC: 815421022445 , Code: 29D-UFH-M4E1CBFS-APAR600211M3
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