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(5)
Prices checked
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August 2026 on GunPartPicker
Aero Precision M4E1 Threaded AR-15 Barreled Upper 5.56 Mid-Length Atlas R-One - 16" ranked #25 of the 690 upper receivers builders added on GunPartPicker in August 2026, behind the PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight M-LOK Upper - Without BCG or CH, with about 1 in every 167 upper receivers added to builds. Down from #10 in July. 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 for all of August 2026, and today none of the 5 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 35 retailers
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Frequently Built With
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