Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver 8in 1-7 Twist 5/8x24 Thread ATLAS R-ONE Handguard FDE Cerakote
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Aero Precision
Overview
The Aero Precision M4E1 Threaded Complete Upper Receiver is designed specifically for the AR-15 platform and features an 8-inch barrel optimized for .300 Blackout. With a 1:7 twist rate, this upper enhances stability and accuracy, making it suitable for a variety of bullet weights. The 5/8x24 thread pitch allows for easy attachment of muzzle devices, while the FDE Cerakote finish provides a durable and corrosion-resistant surface. This upper is commonly used in .300 Blackout builds, particularly those focused on compact and versatile setups.
Specifications
Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver 8in 1-7 Twist 5/8x24 Thread ATLAS R-ONE Handguard FDE Cerakote
Available Merchants(4)
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Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver 8in 1-7 Twist 5/8x24 Thread ATLAS R-ONE Handguard FDE Cerakote to a build in February 2026.
It was out of stock everywhere we track for all of September 2026, and today none of the 4 retailers we track has it in stock right now. Listed prices start at $526.99 at KY Gun Company for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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