Expo Arms 5.5" 9MM Barreled Upper Builder KIT - No BCG

Expo Arms

Overview

The Expo Arms 5.5" 9MM Barreled Upper Builder Kit is a complete upper receiver designed specifically for the AR-9 platform, featuring a compact 5.5-inch barrel that optimizes the handling and maneuverability of your build. This upper is tailored for 9mm cartridges, making it an excellent choice for builders looking to create a lightweight and versatile firearm suitable for various applications. You’ll commonly find this upper in short-barreled or pistol configurations, appealing to those focused on compact, easy-to-handle setups.