Aero Precision AR-15 M4E1-T 11.5 in Atlas R-One Complete Upper 5.56mm Blac
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Aero Precision
Overview
The Aero Precision AR-15 M4E1-T 11.5 in Atlas R-One Complete Upper is a fully assembled upper receiver designed for the AR-15 platform, featuring a government contour barrel that measures 11.5 inches in length. With a carbine-length gas system, this upper is optimized for reliable cycling and performance using 5.56 NATO ammunition. The salt bath nitride coating not only enhances durability but also provides excellent corrosion resistance. This upper commonly appears in compact builds where maneuverability is key, making it a popular choice for tactical and home defense setups.
Specifications
Aero Precision AR-15 M4E1-T 11.5 in Atlas R-One Complete Upper 5.56mm Blac
Build history on GunPartPicker
Builders have been adding the Aero Precision AR-15 M4E1-T 11.5 in Atlas R-One Complete Upper 5.56mm Blac to their builds on GunPartPicker since April 2026. All time, it ranks #659 of the 1,714 upper receivers builders have added.
It was out of stock everywhere we track for all of September 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $409.99 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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Frequently Built With
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