MW5 Mercenaries - Showing off Ultra-Autocannon/5
UAC/5 is pretty fun. I'm running a Rifleman RFL-3N with 2x UAC/5 and 2xMedium Laser.
UACs shoot a burst of 3 rounds (only uses one "ammo"), and can be fired again without waiting for the cooldown. Firing repeatedly has a chance of jamming, which produces a double-length cool down when it happens. Well worth spamming though, as the damage output is quite impressive.