Aero Precision 11.5" 5.56 M4E1 Threaded M-LOK S-ONE Complete Upper - Black
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Aero Precision
Overview
The Aero Precision 11.5" 5.56 M4E1 Threaded M-LOK S-ONE Complete Upper is a fully assembled upper receiver built on the M4E1 platform, designed for AR-15 builds. With an 11.5-inch barrel chambered in 5.56 NATO, this upper delivers a compact yet effective performance, suitable for close-quarters engagements. This upper is commonly found in SBR (Short-Barreled Rifle) configurations, where maneuverability and versatility are key.
Specifications
Aero Precision 11.5" 5.56 M4E1 Threaded M-LOK S-ONE Complete Upper - Black
Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision 11.5" 5.56 M4E1 Threaded M-LOK S-ONE Complete Upper - Black to a build in February 2026.
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 $599 at AR15 Discounts for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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