Weapon damage in NieR: Automata varies with each swing. Upgrades reduce damage variance and boost potential damage per swing.
The Iron Pipe boasts the game's widest damage range but also possesses exceptionally high potential damage. Its effectiveness is unpredictable, but it's a worthwhile weapon to acquire. Here's how:
The Iron Pipe is a rare fishing reward found in sewers. Both sewers offer equal drop rates; the one near Resistance Camp is more accessible.
Fast travel to Resistance Camp, then head right towards the Amusement Park. After crossing a small gap, you'll find an open manhole under a highway.
Descend into the sewer, enter the water, and begin fishing. Besides the Iron Pipe, you'll find other sellable junk. There's no guaranteed method; obtaining it may take several attempts. Use your Pod's light to improve visibility underwater. Another sewer is located en route to the Flooded City.
The Iron Pipe's damage range remains substantial regardless of upgrades. However, successful hits can yield some of the game's highest damage outputs, making it a valuable early-game weapon. Upgrade requirements and resulting stats are: