That's the Source Lightning Bolt from the latest SM round 30. Forever unavailable to get again. (thanks devs, for never making the Zeus' bolt Wonder Woman carries on her back in GoME an alternate style... /s)
Yet. AF3 was slightly before my time (I started when the current team at the time was finishing it off). I've been wanting to add it after SM Season 2. Reskins from SM happened before, they'll happen again. Like.... maybe someone should check out Zeus Orbital Strike on PC Test if they can...