The Kit contains the basic parts to help you build an AR-15 upper assembly. It Includes a stripped upper receiver, a forward assist assembly, and an ejection port assembly. The upper receiver is forged from 7075-T6 aluminum and has M4-type feed cuts inside for reliable feeding. It is compatible with standard or mil-spec lowers and components.
Tactical Upper Assembly Build Kit has an Aero Precision Stripped Upper Receiver (100-010-612), a DPMS Forward Assist Assembly (231-000-063), and a DPMS Ejection Port Cover Assembly (231-000-359).