Aero Precision's M4E1 223 Wylde Assembled Upper Receiver is a testament to precision engineering and design excellence. Featuring a .223 Wylde chamber, this upper receiver is optimized for both military 5.56x45mm NATO and civilian .223 Remington ammunition, ensuring versatility and superior performance. The 18" barrel with a rifle-length gas system enhances reliability and reduces wear on moving parts, making it ideal for extended range sessions and competitive shooting. Aero Precision is renowned for its innovative designs and commitment to quality.

Key Features:
- Manufacturer: Aero Precision
- Model: M4E1
- Caliber: .223 Wylde
- Condition: New
- Action: Semi-Automatic
- Finish Color: Anodized Black
- Barrel Length: 18"
- Number of Magazines: N/A
- Capacity: N/A
- Optic Footprint: N/A
- Unique Features: Enhanced M-LOK Handguard, Low Profile Gas Block
- Night Sights: No
- External Safety: No
- Threaded Barrel: Yes
- What's In The Box: Upper Receiver Only
- Weight: 68.16 oz
- Length: N/A
- Width: N/A