[L473ncy]

SAW Gunner tactics (from video games) appears to be short bursts of fire to keep enemies down so the squad can advance safely. A DMR or sniper can do this as well just by giving slow accurate fire to let the enemy know that there's accurate fire coming their way. Either way the goal is to keep them down so you can rush in and eliminate the enemy team if they're holed up somewhere or if they're advancing on a hill/bunker.