The Five Seven is now a burst-fire weapon. This burst fire increases its rate of fire to make it the fastest of all pistols during the burst, but there is still a burst delay. It is, however outclassed by the TAC 45 in all other areas. It still can be a useful secondary for single-fire primaries like snipers.
The Custom version, the Popper, fires five round bursts. However, these bursts can overlap, leading to heightened rate of fire.