Jury-rigged together from a chainsaw and old car parts the breakers bring in from the city, the auto axe is a gas-operated steel cutter. While used to cut steel for construction projects of The Pitt, auto axes were designed by Marco, a slave engineer in The Pitt, for combat through and through.
The auto axe appears to be a modified industrial tool, strongly resembling a concrete saw or industrial grinder. The original blade seems to have been modified or replaced with a blade of a different kind, one with four rough circular holes punched through at the edges which create four individual blades resembling axe blades.
The auto axe inflicts large amounts of damage with its sharp rotating blades, and functions like the Ripper. It can also be repaired using Rippers. This weapon does devastating damage, especially with raw damage increasing perks. These perks attributes are added per every "tick" of the auto axe. Damage done by this weapon can be further increased with the Auto Axpertperk which is available within The Pitt, after collecting 10 steel ingots from the steelyard.
Steel saw, a weaker version of the auto-axe that can be found on certain slaves.
Man Opener, a stronger variant that ignores damage resistance.
Most slaves carry auto axes; regardless of which side you take during the slave revolt, many slaves will die, leaving their auto axes to be looted.
PCPlayStation 3 Sometimes this weapon will disappear from first person perspective, but still function perfectly. If you then bring up the Pip-Boy while the weapon is equipped, the Pip-Boy will have disappeared from your arm also. This bug can be temporarily remedied by switching weapons or re-equipping the auto axe. You can also fix it by saving and loading the game. Making an attack with V.A.T.S. can also restore the weapon.
Xbox 360 Sometimes, out of V.A.T.S, the weapon may buckle, and instead of functioning with repeated damage (like the Ripper), it may function like a normal melee weapon and repeatedly hit only once, before pulling back and hitting again. This is easily fixable by simply stopping.
Sometimes the auto axe rotary blade will stop spinning in 1st person and will start spinning again in 3rd person.
The auto axe is seen being used by slaves as a machining tool.
↑The Lone Wanderer: "I guess you're right. What are you working on?" Marco: "Weapons. Lot's of 'em. There's something coming... and soon. So, I take the crap we find out in the yard and some of the tools we use, and I make them into stuff we can fight the bosses with." (Marco's dialogue (The Pitt))
↑The Lone Wanderer: "I need a weapon. Can you help me out?" Marco: "Yeah... you're the one Midea told me about. Wernher sent you, right? I can help you out. Take this. It's called an Auto Axe. Nice, huh? I make 'em out of the old car parts the breakers drag in from the city. Do what you can with it, just be careful around the bosses. Make a wrong move and you're done." (Marco's dialogue (The Pitt))