A paintball marker, also known as a paintball gun, is the main piece of equipment in the sport of paintball. Markers use an expanding gas, such as carbon dioxide or compressed air, to propel paintballs through the barrel. Frequent paintball players prefer the term "marker" rather than "gun", which may mitigate the public perception that paintball markers are weapons, and that paintball is a dangerous sport. The term derives from its original use as a means for forestry personnel and ranchers to mark trees and wandering cattle.[citation needed]
The muzzle velocity of paintball markers is approximately 300 feet per second, or 90 meters per second, 200 miles per hour or 320 kilometers per hour. Muzzle velocity above 300 feet per second has been ruled unsafe in most commercial paintball fields[1]. Below this speed, most paintballs break upon impact, only a small bruise upon its target. Because of the high velocity of flying paintballs, players must wear masks to protect the eyes, mouth, and ears when barrel blocking devices are not in place.
Most paintball markers have four main components: the body, hopper (usually not included with a gun unless bought in a package), gas system (air tank) (also not included unless in a package), and barrel (almost always included).
Copy From : http://en.wikipedia.org/wiki/Paintball_marker
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