Bone Head

Bone Head is one of Sledge's underlings holed up next to Fyrestone. You need to defeat him to get the Digistruct Module for the Catch-a-Ride station in the "Bone Head's Theft" mission. Completing the mission will earn you $1,552, 4320XP, and the Bone Shredder SMG in addition to access to vehicles via the Catch-a-Ride.

He's a level 10 Bandit, so you need to make sure you're close to that too. You'll also need to be carrying a LOT of ammo because his shield is very tough. His hideout is due north of Dr. Zed's, but it's separated by wall and rock. Expect to encounter some lower level Bandit Killers along the way. There are two entrances to his lair. One is a narrow path with good cover while the other is pretty much wide open. Once you get close you'll see he has a fair number of thugs around him. Hit and run tactics would be the best idea, but they don't work because his shields regenerate and his thugs respawn.

My level 6 soldier approach was to use the narrow path just north of the Fyrestone entrance, sneak up as close as I could, and drop my turret. While the turret is firing, you can sneak some shots through the shield at him. Be careful not to expose yourself because his SMG, Bone Shredder, can take out most shields in a single burst. Drop into cover behind the rocks before the turret disappears or you'll be in for some pain. While you're waiting for your turret to recharge, take some quick pot shots at him to limit his shield from regenerating - incendiary weapons seem to be especially effective. Drop the turret and repeat the process. It may take several tries to finally drop him. Once he's down the rest of his thugs are pretty easy to wipe out.