To reduce the lag caused by the explosions of the chemical gun and the petrol bomb, they suggested putting a new weapon, a fire extinguisher that extinguishes several flames, this will reduce the lag caused by the flames and the explosions. look at this image : https://ibb.co/fOTYeq
As you saw in the image, you could use this fire extinguisher to make the weapon and use it, it's in the veteran pizzeria, the room with 7500 pizzas.