Unlock Location:
- Head to the Ripper Drill Site 'Saw's clench' and fight the 'Rippa Roadbirds'.
- In order for them to spawn you need to fight off hoards of mobs before hand.
- Once defeated, you can restart the fight using the Moxxi's encore machine to try again.
- Extra note. Jumping out of the arena can be difficult. Locate the small rock pile on the right hand side of the exit to jump and grab onto the ledge above.