The Collector Assault Rifle was an assault rifle designed and reverse engineered from the prothean assault rifle by the Reapers for use by the Collector ground forces. Unlike the particle beam and sniper rifle, the assault rifle uses more conventional projectiles rather than particle energy, making it more comparable to asari cycle weaponry. Its power source appears to be an internal organ with biotic capacitance; its ammunition resembles pellets of metallic enamel that strip shields extremely fast and with deadly efficiency. This makes it extremely useful against shielded soldiers, allowing Collector troopers and captains who use them to tear apart enemy infantry with relative ease. The weapon was only used by troopers and captains, and it was the most common weapon used by the Collector armies. So far, the weapon has only ever been used by Collector forces, with all remaining instances of the weapon being destroyed with the Collector Base in 2185 CE.