In the post apocalyptic wastes as a last resort the Scavenger and Wastelander craft it from what is available.
The Bumper Sword would obviously resemble the bumper sword from Fallout: New Vegas, with a name change.
Mechanics: The sword would be two handed and would have a much longer range than the standard combat knife. It would have two modes of attacking, a thrust and a swing/slice. The thrust wouldn't be able to kill antlions,zombies, ect in the head (Not including antlions), but it would be able to do extra damage to humans without armor. And the swing/slice would have a chance to decapitate the hordes of slow headcrab zombies if hit in the right part of the head, but not humans (That would be OP). The sword would have a chance to do bleeding damage (Maybe 30%), about 5 seconds and you'd lose 10 hp over that time or something like that. The sword would be quite slow to swing and would reduce movement speed so that people could outrun the user but zombies would be killed.
Damage: The sword would inflict on average 15-30 not including the mechanics above.
Cost: 150 Scrap - 75 Small Parts - 0 Chemicals.
Usage: The sword is more of a gladiator style fighting sword for competitions but would be effect for clearing out crowds of zombies in a small area.