E-Tech Weapons are alien weaponry in Borderlands 2
The manufacturers have started to dismantle the Eridian weapons and started incorporating the technology and reverse engineering
ETech weapons result in crazy and wacky sci-fi style guns such as the old school BFGs.
E-Tech weapons rarity color is violet/magenta
How to get e-tech weapons in Borderlands 2
You will find E-Tech weapons as loot from monsters, mostly from Bosses. The E-Tech weapons are very rare so it might take you a while until you find one.
You also have a chance to get one from Golden Chest