This is the Aero Precision AR-15 assembled upper. 

Features:

• Superior Construction: Crafted from aerospace-grade 7075-T6 aluminum.
• Precision Engineered: According to Aero Precision, each unit undergoes stringent quality checks.
• Mil-Spec Compatibility: Designed to be compatible with standard AR-15 and M16 components.
• Forward Assist & Ejection Port: Pre-assembled with a forward assist and ejection port cover.
• Corrosion Resistant: Finished with a hard-anodized black coating to offer resistance against wear, abrasion, and corrosion.

Aero Precision’s commitment to quality is evident in every contour and weld of this assembled upper.

The Aero Precision AR-15 Assembled Upper is your gateway to a reliable and enhanced shooting experience.