A paintball marker, also known as a paintball gun, is the central piece of equipment in the sport of
paintball. Markers harness the power of an expanding gas (
carbon dioxide or
compressed air) to propel paintballs through the barrel. Muzzle velocities can approach 300 feet per second (91 meters per second), though any speed above 300 feet per second is unsafe. Below 300 fps, most paintballs will break upon impact without leaving significant damage beyond a localised but fairly severe bruising. Due to the extreme speed of flying paintballs, players must wear masks to protect the eyes, mouth, and ears when barrel blocking devices are not in place. Every commercial paintball field has rules regarding barrel blocking devices, muzzle velocity, and wearing masks.
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