Krom

Krom is a bandit leader in the Rust Commons and is essentially the third "actual boss". Krom's Canyon is his home and in his possession is the second piece of the vault key. Killing Krom is vital to the main plot and is also a trophy/achievement. His weapon of choice is his turret which fires rockets and machine gun rounds, but when killed, he drops his unique repeater pistol, Krom's Sidearm.

The mission to kill Krom, entitled The Next Piece, comes from Crazy Earl. View that page for details and strategy.

Background
Like Flynt, Krom worked as a prison warden for Dahl until the prisons were abandoned and the convicts set free. His real name is Leslie, which he always hated and changed as soon as Flynt set him up as second in command.

Ironically, in one of Patricia Tannis' recordings, she mentions a convict she shot in the back several times, killing him, for crossing into her side of the encampment. As a result of her insanity, she decides his name was Leslie, who had a troubled childhood where everyone picked on him for having a girl's name, which caused him to resort to a life of crime.

Strategy
An effective method used for killing Krom is to continue to fire away at his turret whenever you're near him yet still on the stairs,. He will not step off of the turret to come and kill you. When you're on the stairs, make sure his turret fire cannot reach you, and continue to shoot at him, while killing the other enemies at the top surrounding him. This is an easy method used for killing him, since you take little to no damage, depending on if you get into the correct position.

Alternately, a very quick and effective way to kill Krom is to stand at the rock arc at the entrance to his boss area and use a sniper rifle or a launcher. By popping out to shoot then taking cover behind the right side of the arc, you can easily dispatch him with few a shots and little risk. Once Krom is defeated, just work your way up killing bandits as you climb.

See here for more info on the quest.

Quotes

 * Get em! Get em!
 * Minions attack!
 * There's more than one way to skin a merc!
 * Suck on this!
 * Don't just stand there, shoot!
 * Got someone else for ya!
 * Destroy them! Destroy them, leave nothing left! Ain't nothin! Nothin!
 * I hate this shithole planet anyway. (Death rattle) - upon death