Aero Precision's M4E1 .300 Blackout Assembled Upper Receiver is a marvel of engineering, designed with precision and quality in mind. Featuring a 16" barrel with a pistol-length gas system, this upper receiver is perfect for range time and training. The anodized black finish and M-LOK handguard enhance its durability and ease of use. Aero Precision is renowned for its innovative designs and commitment to quality.

Key Features:

• Manufacturer: Aero Precision
• Model: M4E1
• Caliber: .300 Blackout
• Condition: New
• Action: Semi-Automatic
• Finish Color: Anodized Black
• Barrel Length: 16"
• Number of Magazines: Not Included
• Capacity: Not Applicable
• Optic Footprint: Not Included
• Unique Features: M-LOK Handguard, Pistol-Length Gas System
• Night Sights: No
• External Safety: No
• Threaded Barrel: Yes
• What's In The Box: Upper Receiver Only
• Weight: 29 oz
• Length: Not Specified
• Width: Not Specified