Upper Receivers
Aero Precision Upper Receivers
The M4E1 upper integrates the handguard mounting surface into the receiver, removing the separate barrel nut and keeping the top rail continuous.
Status: In court-supervised receivership since 5 May 2026. Still manufacturing and shipping; confirm warranty terms before buying. Source.
Current upper receivers
| Model | Type | Construction | Notable features |
|---|---|---|---|
| M4E1 Threaded Stripped | Stripped | Forged 7075-T6 | Integrated handguard mount, continuous top rail |
| AR15 Stripped (M4) | Stripped | Forged 7075-T6 | Standard mil-spec, M4 feed ramps |
| M4E1 Complete Upper | Complete | Forged 7075-T6 | Barrel, BCG and handguard fitted |
Line-up checked against the manufacturer's catalogue. Checked 2026-08-01