M4E1 Threaded 10" .300 Blackout Complete Upper Receiver w/S-ONE Handguard
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Aero Precision
Overview
The Aero Precision M4E1 Threaded 10" .300 Blackout Complete Upper Receiver is designed for builders looking for a compact and versatile upper that is ready to be installed right out of the box. With a 10-inch barrel optimized for .300 Blackout, this upper provides excellent performance in both suppressed and unsuppressed configurations, making it suitable for various shooting applications. This upper receiver is commonly found in short-barreled rifles and builds intended for close-quarters engagements or home defense scenarios.
Specifications
M4E1 Threaded 10" .300 Blackout Complete Upper Receiver w/S-ONE Handguard
Available Merchants
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Build history on GunPartPicker
Builders on GunPartPicker first added the Aero Precision M4E1 Threaded 10" .300 Blackout Complete Upper Receiver w/S-ONE Handguard to a build in February 2026.
Updated · from real builds on GunPartPicker
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