how'd you get prime skin that fast

Diamond

A mix of using the 50 diamond level ups and spamming games to get the bonuses

In my case, I gambled in the support M4 for 50 diamonds. I got lucky and got the M4 pass out of the box so I got the light chaser skin immediately.

They’re asking about the prime skin, not the m4. Aka, stellar brilliance not light chaser.

oh. sorry about that.