Aero Precision M4E1 Threaded AR-15 Barreled Upper 5.56 Mid-Length Atlas R-One - 16"
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Aero Precision
Overview
The Aero Precision M4E1 Threaded AR-15 Barreled Upper 5.56 Mid-Length Atlas R-One - 16" is a upper receiver. Compare prices from multiple merchants and find the best deal.
Specifications
Aero Precision M4E1 Threaded AR-15 Barreled Upper 5.56 Mid-Length Atlas R-One - 16"
Available Merchants(6)
Prices checked
Stock Alert
October 2026 on GunPartPicker
Aero Precision M4E1 Threaded AR-15 Barreled Upper 5.56 Mid-Length Atlas R-One - 16" ranked #360 of the 844 upper receivers builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #28 of the 2,067 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on mid-length gas, and nearly all AR-15.
It was out of stock everywhere we track every time we checked in October 2026, and today none of the 6 retailers we track has it in stock right now. Listed prices start at $543.99 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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