Pa's Fishing Aid

 is an unique version of Double-Barrel Shotgun added to Fallout 3 with the Point Lookout add-on.

It looks identical to it's regular version, Double-Barrel Shotgun, but differs in damage, price and other characteristics. It can only be repaired by Combat Shotguns.

It deals less damage per shot than the Double-Barrel Shotgun but this is made up for with a higher Critical Hit damage. Pa's Fishing Aid, when combined with the Better Criticals perk can make a single Sneak Attack Critical deal a whopping 2400 damage!

Availability
This weapon doesn't exist in the game itself, so the only way to obtain it is using the console commands.