Does anyone know how I got this [purple lightning effect](https://youtu.be/66am05Afk98) all of a sudden on every gun I pick up?
I was afk for most of the early rounds, having ballistic knife as my loadout weapon and everytime I died and respawned my weapon increased in tier from red to green to blue to purple and only then did this purple lightning appear on every gun I picked up from that point onwards.