Aero Precision's M4E1 5.56 NATO Assembled Upper Receiver combines precision engineering with a sleek design. Featuring a 14.5'' mid-length barrel, this upper receiver is crafted from forged 7075 T6 aluminum with a hardcoat anodized finish, ensuring durability and reliability. Ideal for range time and training, the M4E1 offers a monolithic assembly with a full-length Picatinny top rail and M-LOK attachment points, enhancing customization options. Aero Precision is renowned for its innovation and quality in firearm components.

Key Features:
- Manufacturer: Aero Precision
- Model: M4E1
- Caliber: 5.56 NATO
- Condition: New
- Action: Semi-Automatic
- Finish Color: Anodized Black
- Barrel Length: 14.5''
- Number of Magazines: Not Included
- Capacity: Not Specified
- Optic Footprint: Picatinny Rail
- Unique Features: Enhanced M-LOK Handguard
- Night Sights: No
- External Safety: No
- Threaded Barrel: Yes
- What's In The Box: Upper Receiver Only
- Weight: Not Specified
- Length: Not Specified
- Width: Not Specified