The Aero Precision M4E1 .300 Blackout Assembled Upper Receiver is a testament to precision engineering and design excellence. Crafted from 7075 T6 aluminum with a black anodized finish, it features an 8" 4150 Chrome Moly Vanadium barrel with a 1-7 twist rate, ensuring superior performance and reliability. The M-LOK handguard provides a versatile platform for accessories, making it ideal for range time and training sessions. Aero Precision is renowned for its innovation and quality in firearm components.

Key Features:
- Manufacturer: Aero Precision
- Model: M4E1
- Caliber: .300 Blackout
- Condition: New
- Action: Semi-Automatic
- Finish Color: Anodized Black
- Barrel Length: 8"
- Number of Magazines: N/A
- Capacity: N/A
- Optic Footprint: N/A
- Unique Features: M-LOK Handguard, 1-7 Twist Rate
- Night Sights: No
- External Safety: No
- Threaded Barrel: Yes
- What's In The Box: Upper Receiver Only
- Weight: 18 oz
- Length: N/A
- Width: N/A