The PDW-16 Hailstorm is the second-generation TRSMG. Like all second-generation SMGs, it has slightly lower dps and much larger magazine than its first-generation cousin, but cannot use the Extended Magazine rail attachment. This leaves the rail attachment free for the highly desirable Advanced Laser Sight. The PDW-16 Hailstorm also has a forward grip slot to counter the slightly higher horizontal recoil than its cousin.
A compensator redirects gases upward, reducing vertical recoil. The increased sound pressure will cause the player to show on the minimap from farther away, and increased weapon bulk reduces accuracy when firing from the hip.
Both are excellent in CQC, but the differences do start to show with the Hailstorm having a lower rate of fire and large magazine, while the Armistice having a much higher rate of fire and smaller magazine. The SMG-46 Armistice reward those who can land their shots on the target as it's magazine practically evaporates after a few seconds, while the Hailstorm rewards those who can take advantage of its continuous stream of bullets. Both SMGs cost the same, at 1000 certs, or 700 Station Cash.
It is possible to get both Ribbons and Medals for using the PDW-16 Hailstorm. Each Ribbon is a standard reward for achieving a set amount of kills with the Hailstorm. Medals relate to how many overall kills you have with the Hailstorm.