Where's the Overshield in Streets?

I can’t find the Overshield in Streets. We just lost a game against a player who constantly seemed to have it. 16 body shots, 4 melees, didn’t matter he always had it on, so he couldn’t die. I can’t find it in the replay and he just seems to permanently have extra health. I can’t find it in custom games too, so I’m out of ideas.