The M4E1 Threaded Stripped Upper Receiver is forged from 7075 T6 aluminum, like a regular mil-spec receiver, but with angular external contours that add the strength – and custom look – of a “billet” receiver. The good news: parts compatibility is “mil spec” all the way. The Aero Precision M4E1 Threaded Stripped Upper Receiver accepts any mil-spec AR-15 bolt/carrier group (not included) and fits on a standard AR-15 lower.
- 7075 T6 aluminum forging, final machined to accept standard AR-15 parts
- Hardcoat anodized finish, matte black
- M4-type feed ramps
- .250″ takedown pin holes
- “Stripped” = forward assist & ejection port cover NOT included
The Aero Precision M4E1 Threaded Stripped Upper Receiver comes with laser-engraved T marks on the Picatinny top rail.