Barrel Cover
Blocking of the paintball gun barrel is a safety precaution used to prevent accidental firing of the paintballs by using a barrel cover. Players will place the barrel cover on when they are not being active in a game. These devices are typically in a form of a small bag known as a barrel sock or barrel condom. Before the barrel sock was introduced in the late 1990s, players would use barrel plugs, which is a piece of hard plastic with rubber o-rings placed in the front of the barrel.