Aero Precision's M4E1 5.56 Assembled Upper Receiver Threaded with AR15 Semi-Cut Black showcases a new angular machined design, setting it apart from standard mil-spec upper receivers. Crafted from 7075-T6 Aluminum, it is precision machined to work seamlessly with all mil-spec AR15 parts, featuring a port door and forward assist pre-installed for enhanced functionality.

Ideal for range time and training, this upper receiver pairs perfectly with Aero's M4E1 Lower Receiver, offering a billet receiver look at a fraction of the price. Aero Precision is renowned for its innovation and quality craftsmanship.

Key Features:
- Manufacturer: Aero Precision
- Model: M4E1
- Caliber: 5.56
- Condition: New
- Action: Semi-Automatic
- Finish Color: Black
- Barrel Length: N/A
- Number of Magazines: N/A
- Capacity: N/A
- Optic Footprint: N/A
- Unique Features: Angular machined design, enhanced forging for billet look
- Night Sights: No
- External Safety: No
- Threaded Barrel: Yes
- What's In The Box: Port door, forward assist
- Weight: 0.45 lbs
- Length: N/A
- Width: N/A