Like the title says. I'm google, have read three separate wiki like pages covering various game modes over the seasons, and finding nothing, but I have captured footage showing (deleted original, only have edited, which only shows gameplay, no mode selection clues) and remember playing this game mode with only snipers, and maybe wingman too?

Didn't it go through like 2 different names for the mode as well? Sharpshooter or something?