Have we figured out what the red glow is on dropped weapons?

[Voidfox]

Not the powerful, temporary weapons found during quests...

I couldn't find the answer to this, my apologies if this is the 836th post on this question.

[Cutlass Jack]

Curious about that myself. I had it appear on a completely unremarkable weapon drop yesterday.

[Caillend]

those are non tradeable to others

[Blackwolfe]

those are non tradeable to others

It's a bug. I've not seen red glow on non-special weapons since they supposedly fixed it but I suppose it can still occur.

[fishboy11]

It's a bug. I've not seen red glow on non-special weapons since they supposedly fixed it but I suppose it can still occur.

it still occurs quite a bit for me, mostly on white quality weapons

[Nallic]

As far as I understand, the red glow is supposed to indicate the weapon is 'ideal' for the current encounter or Co-op. For example finding a while grenade launcher suggests this grenade launcher is 'best suited' for the co-op you're running.

[Blackwolfe]

It's only supposed to be there for temporary special weapons. Sometimes for killing enemies (rocketlaucher/detonator in raid on san quentin, detonator /sniper/reaper when saving erin and so on). Sometimes you'll find weapons with red glow in arkfalls (from 99er pulverizers for example) or in a few roadside emergencies (weapon shipment).

[Xara]

I thought it just meant it had a nano-effect on it, but I never paid much attention

[Badblade]

I also thought it was for "elemental" nano effects. Fire weapons have a bright fiery aura (in fact, first time I saw this, I thought I got lucky and got a legendary weapon lol). You'll notice that electricity weapons have a blue electricky aura.

[russell733]

Its not the temporary super weapons. Its a different red glow. Its not elemental effects. Someone said non tradeable items, and someone said they are the VBI items, but I really dont know and wish a dev would tell us what its supposed to be