Tobi opened fire in short controlled bursts. His visor flickered red but remained blue for the most part. The vikings using the metal panels was a smart move but Tobi has a very easy solution. 

Tobi reached and pulled put a cluster grenade. The force of of impact would break a couple arms if it didn't shred the panels. He reached to pull the pin but stopped when his scanners picked up a chemical substance in the air. His cluster grenade might burn out the toxin if it exploded. Blue didn't let himself get frustrated for someone using a tactic that a simple filter could negate. He held on to the cluster grenade, while blue would hesitate to pull the pin, something stopped him. Red wouldn't let blue pull the pin yet.