Aero Precision's M4E1 5.56 Assembled Upper Receiver with the 11.5'' barrel and 9'' ATLAS S-ONE Handguard in Flat Dark Earth is a testament to superior engineering and design. This upper receiver is crafted for the AR-15 platform, featuring a robust anodized finish and a sleek, lightweight profile. The 11.5'' barrel, made from 4150 CrMoV steel with a QPQ finish, ensures durability and precision, while the ATLAS S-ONE handguard provides a comfortable grip and versatile mounting options.

Ideal for range shooting and training, this upper receiver offers reliability and performance. Aero Precision is renowned for its innovative designs and commitment to quality, making this a trusted choice for firearm enthusiasts.

Key Features:

• Manufacturer: Aero Precision
• Model: M4E1 5.56 Assembled Upper
• Caliber: 5.56 NATO
• Condition: New
• Action: Semi-Automatic
• Finish Color: Flat Dark Earth
• Barrel Length: 11.5"
• Number of Magazines: Not Included
• Capacity: Not Applicable
• Optic Footprint: Picatinny Rail
• Unique Features: Lightweight, Enhanced Forging
• Night Sights: No
• External Safety: No
• Threaded Barrel: Yes
• What's In The Box: Upper Receiver, Handguard
• Weight: Not Specified
• Length: Not Specified
• Width: Not Specified