RIA T7

"Thermal SMG. The T7 shoots white hot thermal rounds designed to cause maximum trauma to soft targets." -Official Description

Overview
The RIA T7 is an SMG in that deals  damage. It is very effective against almost anything due to its burning effect and high RPS. The damage and after-burning effects of the version make the T7 even better, as well as a safe, excellent weapon choice from a distance for eliminating zombies that are hard to kill and deal high damage, such as Bloaters.

The version is very effective in the map Zombie Pods for eliminating the purge nests. However, Tenacious is needed for this to be any better than other weapons in order for this to happen as the damage over time is ever so slightly higher than the direct damage so it would be better in the long run (3 seconds); however, in the version, the difference no longer exists, making Deadly more useful.

Trivia
Since there is a variant of this gun, the RIA 7 (that does physical damage), the "T" in RIA T7 most likely means "Thermal".