User blog comment:USMC Lance/Whats the better rifle: M16 or AK47?/@comment-28584497-20111013234900/@comment-28584497-20111016160922

While that's true, somebody can just set up a killzone and be almost unstoppable in Op Metro. Especially because the tunnel walls are indestructable. I've done it myself, and held off wave after wave of enemies.