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Aero Precision

Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE

Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE - Upper Receiver for AR-15 - view 1
Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE - Upper Receiver for AR-15 - view 2
Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE - Upper Receiver for AR-15 - view 3
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Aero Precision

Overview

The Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly features a complete upper receiver designed for the AR-15 platform, specifically optimized for 5.56 NATO caliber. With an 11.5-inch barrel, this upper assembly strikes a balance between compactness and ballistic performance, making it suitable for various applications, including close-quarters engagements. You’ll commonly find this upper in builds focused on versatility and maneuverability, especially in tactical or home defense setups.

Specifications

MPN8610
AssemblyComplete
PlatformAR-15
Receiver TypeM4E1
Caliber5.56 NATO
Barrel Length11.5

Available Merchants(3)

Prices checked

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Sportsmans Outdoor Superstore
Flat rate shipping
Shipping Speed
Out of Stock
$28
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AR15 Discounts logo
AR15 Discounts
~$9.99 est. shipping
Shipping Speed
Out of Stock
$432
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Dirty Bird Industries logo
Dirty Bird Industries
~$9.95 est. shipping
Shipping Speed
Out of Stock
$455
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Build history on GunPartPicker

Builders have been adding the Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE to their builds on GunPartPicker since February 2026. All time, it ranks #341 of the 1,572 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO and nearly all AR-15.

Today none of the 3 retailers we track has it in stock right now. Listed prices start at $28.39 at Sportsmans Outdoor Superstore for when it comes back.

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Frequently Built With

The part most often added in each category by the 14 builds that include this one

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Charging Handle$32in 2 builds
Rock River Arms Single Stage Trigger KIT, Black

Rock River Arms Single Stage Trigger KIT, Black

Trigger$34 · out of stockin 2 builds
American Defense UIC Billet Lower Receiver - Ambidextrous

American Defense UIC Billet Lower Receiver - Ambidextrous

Lower Receiver$38 · out of stockin 2 builds
Fortis SHIFT Vertical Grip - M-LOK

Fortis SHIFT Vertical Grip - M-LOK

Foregrip$57in 2 builds
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PROMAG Archangel Yugo Pap AK-Series OPFOR Black Polymer Buttstock Set (AA129)

Stock & Brace$44in 2 builds

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