M4E1 5.56 Assembled Upper Receiver W/M-Lok Atlas S-One Handguard - M4E1 5.56 Assm Uppr 11.5" Carbine 9" Atlas S-One Hg FDE
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Aero Precision
Overview
The Aero Precision M4E1 5.56 Assembled Upper Receiver is a complete upper designed for the AR-15 platform, featuring an 11.5-inch barrel chambered in 5.56 NATO. This receiver type offers enhanced compatibility and a streamlined profile, while the integrated M-LOK Atlas S-One handguard allows for easy attachment of accessories, ensuring you can customize your build to suit your needs. This upper receiver is commonly utilized in compact builds, making it ideal for those looking to create a maneuverable firearm for tactical applications.
Specifications
M4E1 5.56 Assembled Upper Receiver W/M-Lok Atlas S-One Handguard - M4E1 5.56 Assm Uppr 11.5" Carbine 9" Atlas S-One Hg FDE
Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision M4E1 5.56 Assembled Upper Receiver W/M-Lok Atlas S-One Handguard - M4E1 5.56 Assm Uppr 11.5" Carbine 9" Atlas S-One Hg FDE to a build in March 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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