Guardian (enemy)

"Hold your ground... Forever."

The Guardian
Guardian is the Title of orange combat rifles manufactured by Tediore. It indicates that the weapon has ammo regeneration. As its name suggests, Guardian Defends. And what do you need to defend something? Bullets! As a weapon title, it can appear with a wide range of damage values, accuracy, and so forth, possibly with elemental effects.

Examples are on the talk page.

Acquiring Tediore Guardian
This weapon can be obtained through many ways including - Looting chests and weapon crates throughout Pandora, dropped by higher level enemies and can be on sale at weapon vendors infrequently.