Scavenger Rounds?

Scavenger is a new gamemode that comes with the latest expansion pack; aftermath. It's a bit like cq domination, except you only start with a pistol, knife and grenade. On several places on the map you can find weapons that you can pick up. These weapons have different levels. Higher level guns have for example red dot sight and foregrip while a level 1 weapon might have iron sights only. If you die you lose the gun you've picked up.

Scavenger is played in two teams and you have won when the enemy team hasn't got any tickets left.