I mean, I don't know if this is on purpose or an oversight, but I unlocked the Hidden Compartment perk (first Ketchcrash mission completed each week rewards a weapon with Deepsight Resonance). My warlock is at max light (1580) and the gun dropped at 1350.
-
I recently got a new sidearm at 1350 like that as well. Pretty sure it had a red border as well