M4E1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4E1 5.56 Assem Upper Govt 11.5" Bbl Carbine Threaded FDE
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Aero Precision
Overview
The Aero Precision M4E1 5.56mm Assembled Upper Receiver features a complete assembly with an 11.5-inch barrel, designed specifically for the AR-15 platform. This upper receiver is chambered in 5.56 NATO and comes in a flat dark earth (FDE) color, providing a sleek and functional addition to your build. This configuration is commonly used in compact builds, making it ideal for those looking for a shorter barrel length without sacrificing performance.
Specifications
M4E1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4E1 5.56 Assem Upper Govt 11.5" Bbl Carbine Threaded FDE
Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision M4E1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4E1 5.56 Assem Upper Govt 11.5" Bbl Carbine Threaded FDE to a build in February 2026.
It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $484.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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