Hybrids(Help Please)

I decided to go back to bl1 a couple days ago, I've never put much time into the game so I don't really understand alot about how the loot and parts mechanics work in the game, primarily in reference to hybrids. I'd really appreciate if someone could explain either in depth or in layman's terms how the system works. Or point me in the direction of a good video that explains the mechanics of bl1 or just hybrids. My biggest question is can hybrids be applied on non-unique items i.e., on white, green, blue, and purple rarity non-unique loot. Any help would be much appreciated thank you.

P.S. Idk if it matters but I am on ps5.