The Action Army AAP-01 CNC upper receiver is a drop-in upgrade designed to add picatinny rail on the top and bottom for the mounting of lights, lasers, and optics. The built-in iron sights are also slightly raised for easier tracking.
Compatibility:
- Action Army AAP-01 GBB Pistol
- Action Army Original Option Upper Receiver Kit for AAP-01
- Drop-In Upper Receiver
- Type B Style