"A variant of the Nova Blaster that has a better fire rate and a larger clip, but deals less damage per shot." In-Game Description.
Like the standard Nova Blaster, the MX fires energy projectiles that will bounch off surfaces. These projectiles deal the same amount of damage no matter how far they fly or how many bounces they take. This means the the Sentinel can fire around corners or bounce rounds off the ground and still hit his opponents. This variant has a faster firing rate then the standard version and also offers a larger clip size at the expense of damage per shot.