Today, I realised that COV re-uses some parts from Borderlands 2 weapons, and I think that's pretty cool! (Sorry if it's the wrong flair, and for the poor photoshopping) : r/borderlands3
Weapon parts infographic [#4] -Shotguns : r/Borderlands2
Weapon parts infographic [#7] - Lasers : r/Borderlands2
Borderlands 2: The 15 Best Legendary Weapons, Ranked