Metal Storm is a Tier Two talent in Roland's Infantry tree. With this skill killing an enemy adds fire rate to the character's guns and reduces recoil for 7 seconds. Note that contrary to the skill description, the fire rate increase is actually of +11% per level.
Killing an enemy increases Fire Rate and reduces Recoil for a few seconds.
+(11...55)% Weapon Fire Rate
+(15...75)% Recoil Reduction
Ranks beyond 5 may be acquired through the use of class mods.
This skill's name is a shout-out to the Metal Storm Limited company, which specializes in "electronically initiated superposed load weapons technology," a technology used to manufacture some of the fastest firing weapons in the world.