Sir Hammerlock's Rex is a blue pistol in Borderlands 2.
How to get Rex
Requires: Hammerlock's Hunt
Dropped from a badass savage on the way before you drop down to fight Arizona
Stats will be different based on item level.
Rarity: Blue (Rare/Unique)
Fire Rate: 0.8
Reload Speed: 2.2
Magazine Size: 9
Status Effects and Other Bonuses
"Basically, it's a big gun." (red text effect)
Fires as fast as you can pull the trigger