Borderlands/Fridge

Fridge Brilliance

 * The Vault . But what did you expect on a planet called Pandora?
 * Another one from me. I always wondered why the only two guns I had in Borderlands that regenerated ammo on their own were made by Tediore, the more budget of the gun makers. Then, while playing The Zombie Island of Dr. Ned, it hit me. What's better for your budget than a gun which you never have to buy ammo for? - Adbot
 * But Tediore are not the only brand with infinite-ammo or ammo-regenerating guns. Besides, the purpose of budget products is so that you can gain a market in people who don't want to waste money. It's still about profit, and I imagine that guns with that sort of technology would cost more to manufacture, so it would probably be more profitable to make guns that take ammo, since you can make money from ammo sales (although the whole "ammo works in everything" aspect of Borderlands doesn't allow for this).
 * Ammo isn't made by the manufacturers of the weapons, judging from the fact that it always comes in colors that don't belong to a weapons manufacturer (save for Tediore's flat gray, which could simply be them not painting their guns), and whatever happens to be the most common round on Pandora is also likely the type of ammo with the most wildcats. All weapons of a type are definitely of the same caliber. Also, keep in mind: if Tediore doesn't make ammo, but let's say Vladof or Torgue does, Tediore making guns that produce ammo takes money out of their pockets.