There are tons of fire extinguishers located throughout Rogue Warrior. Just keep your eye out for something red on the wall. When you see one, shoot it. If you happen to be neglectful, level 7 is a great place to farm this achievement. Halfway through the level, you will reach a room with 3 soldiers in it. This room houses 5 fire extinguishers. Shoot them and reload your checkpoint until you grab the achievement.