The USAS-12 is an automatic shotgun designed as a combat shotgun manufactured in South Korea during the 1980s. Because of its enlarged box magazine and automatic fire, it is the most powerful shotgun in Madness: Project Nexus. Due to this, the USAS-12 is not purchasable in Arena Mode until the player reaches level 20. It also appears in Incident: 1000A, however with a shorter barrel.
Madness: Project Nexus stats
This high capacity, box magazine fed, fully automatic shotgun is perfect for those days you just don't feel like aiming.
To view an article on the USAS-12 from Wikipedia, click here.