Aero Precision M4E1 Enhanced Barreled AR-15 Upper .223 Wylde Fluted Rifle Gen 2 - 18"
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Aero Precision
Overview
The Aero Precision M4E1 Enhanced Barreled AR-15 Upper is a complete upper receiver designed for versatility and precision, chambered in .223 Wylde to accommodate both .223 Remington and 5.56 NATO ammunition. With an 18-inch stainless steel barrel featuring a 1:8 twist rate and a rifle-length gas system, this upper is ideal for a balance of accuracy and reliability while maintaining manageable recoil. Builders often choose this upper for enhanced precision builds or those intended for multi-caliber functionality.
Specifications
Aero Precision M4E1 Enhanced Barreled AR-15 Upper .223 Wylde Fluted Rifle Gen 2 - 18"
Build history on GunPartPicker
Builders have been adding the Aero Precision M4E1 Enhanced Barreled AR-15 Upper .223 Wylde Fluted Rifle Gen 2 - 18" to their builds on GunPartPicker since February 2026. All time, it ranks #655 of the 1,707 upper receivers builders have added.
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 $674.99 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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