A paintball is a round, dime-sized gelatin capsule with colored liquid inside. Paintballs are similar to large round vitamin capsules or bath oil beads. It rinses out of clothing and off skin with mild soap and water. Paintballs come in a rainbow of colors. A player who is marked is eliminated from the game.
Paintball guns come in a variety of styles.
Some are small stock pistols, powered by small 12-gram CO2 cartridges that need to be changed after 15 to 25 shots. Other paintball guns are rifle-like, with shoulder stocks and longer barrels. These are powered by larger, refillable CO2 cylinders that supply hundreds of shots. Some paintball guns are pump-actions. Each time you shoot, you must first cock the paintball gun by using a pump.