Aero Precision M4E1 Threaded Barreled Upper .223 Wylde Fluted Mid-Length Atlas R-One - 16"
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Aero Precision
Overview
The Aero Precision M4E1 Threaded Barreled Upper is a complete upper receiver designed for the AR-15 platform, featuring a 16-inch barrel with a .223 Wylde caliber, allowing for optimized performance with both .223 Remington and 5.56 NATO ammunition. Its mid-length gas system promotes reliable cycling while maintaining a smooth shooting experience, and the 1:8 twist rate provides versatility in stabilizing a wide range of bullet weights. This upper commonly appears in builds that prioritize the mid-length gas system and .223 Wylde caliber for improved accuracy and reliability.
Specifications
Aero Precision M4E1 Threaded Barreled Upper .223 Wylde Fluted Mid-Length Atlas R-One - 16"
Available Merchants(1)
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Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision M4E1 Threaded Barreled Upper .223 Wylde Fluted Mid-Length Atlas R-One - 16" to a build in February 2026.
Today the one retailer we track is out of stock. Listed prices start at $654.99 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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