Aero Precision M4E1 Threaded .223 Wylde w/ ATLAS R-ONE Handguard Complete Upper Receiver 18 inch Barrel 1-8 Twist A2 Flash Hider Magpul Cerakote Flat
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Aero Precision
Overview
The Aero Precision M4E1 Complete Upper Receiver features an 18-inch barrel chambered in .223 Wylde, allowing you to safely shoot both .223 Remington and 5.56 NATO cartridges. The 1:8 twist rate offers versatility in stabilizing a wide range of bullet weights, making it suitable for various shooting applications. This upper is a solid choice for mid-range builds, particularly those aimed at precision shooting or multi-purpose use.
Specifications
Aero Precision M4E1 Threaded .223 Wylde w/ ATLAS R-ONE Handguard Complete Upper Receiver 18 inch Barrel 1-8 Twist A2 Flash Hider Magpul Cerakote Flat
Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision M4E1 Threaded .223 Wylde w/ ATLAS R-ONE Handguard Complete Upper Receiver 18 inch Barrel 1-8 Twist A2 Flash Hider Magpul Cerakote Flat to a build in April 2026.
Today none of the 3 retailers we track has it in stock right now. Listed prices start at $619.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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