Remove the cap from an empty quart sized bottle and pour the plastic airsoft bullets till the bullets fill about 1/2-2 inches of the bottom of the bottle.
Pour vinegar in the bottle till the bottle is a little more than half full. (to much vinegar will overpower the basic baking soda and make the reaction less powerful.)
Next, take a toiletpaper roll and rip a sheet that is about 2 feet long, pour baking soda down half the sheet of paper.(a little will go a long way)
Roll the paper up and insert it into the bottle. As the toilet paper gets wet the baking soda will get wet and create carbondioxide and put the airsoft bb's under pressure.
Quickly put on the cap and shake. The airsoft grenade is now ready to use. To use pick-up carefully and throw against any hard surface, if made right thebottle will explode sending airsoft bb's everywhere
