Aero Precision's M4E1 5.56 Assembled Upper Receiver with M-LOK ATLAS S-ONE Handguard is a testament to superior engineering and design. This upper receiver features a 16" 5.56 NATO barrel with a 1/7 twist, ensuring precision and reliability. The anodized black finish enhances durability, while the M-LOK ATLAS S-ONE handguard offers a lightweight and ergonomic grip, making it ideal for extended range sessions and training.

Perfect for range time and training, this upper receiver is compatible with standard AR15 components, offering flexibility and ease of customization. Aero Precision is renowned for its innovative designs and commitment to quality, making this upper receiver a top choice for enthusiasts.

Key Features:
- Manufacturer: Aero Precision
- Model: M4E1 5.56 Assembled Upper
- Caliber: 5.56 NATO
- Finish Color: Anodized Black
- Barrel Length: 16"
- Unique Features: M-LOK ATLAS S-ONE Handguard
- What's In The Box: Upper Receiver with Handguard