The M4E1 Threaded Upper Receiver features an angular machined design that helps it stand apart from standard mil-spec upper receivers. It is threaded to accept a standard AR-15 barrel nut and forged from 7075-T6 aluminum and precision machined to work with all mil-spec AR-15 parts. The M4E1 features a picatinny profile, M4 feed-ramps, and .250 take-down pin holes. NOTE: Requires dust cover, forward assist, charging handle, barrel, handguard, gas block, muzzle device, gas tube and BCG (Bolt Carrier Group) to complete.
| Brand | Aero Precision |
| Category | Uppers |
| Series | Threaded Receiver |
| Model | M4E1 |
| Caliber | 5.56x45mm NATO |
| Firearm Fit | AR-15 |
| Gun Platform | AR Style |
| Sights | None |
| Type | Stripped |
| Receiver Material | Aluminum |
| Receiver Finish | Black Anodized |
| Weight | 6.90 oz |
| Search Code | AERO |
| Similar Items | UPPER |
