O - Paintball Terms & Definitions

• OD - Abbreviation for "outer diameter".
  
  
• O-ring - A rubber or neoprene ring used as a gasket. The O-ring is one thing to check if your marker won't recock. Generally, it is good to have extra O-rings on you in case you need to do marker maintenance between games. O-rings & cup seals are small but can break easily, and can make your paintball gun misfire or not fire at all. If you notice a drop in the performance of your marker during the game, try replacing the O-ring or cup seal. They are inexpensive and small and easy to transport.
  
  
  
  
• Offset sight rail - A rail mounted at an angle to the marker's vertical axis. It allows a sight to be mounted so that it is un-obstructed by the hopper and the feed nipple. The Offset Sight Rail from Lapco, and Offset Sight Rail from In Yo Face Paintball Products both help to give players a more natural shooting angle and easier aiming. In law enforcement, military, and hunting firearms, the best aiming position people use is always to hold the barrel of the gun directly in front of them. Offset sight rails give paintball players to aim and shoot in a much more natural style.
  
  
• One-for-One - A tournament penalty where a judge ejects both players who committed a penalty as well as another teammate, usually the closest one.
  
  
• Old School - This usually refers to the technology players used or the game format of the paintball games played prior to 1998. Before 1997, a majority of the athletes played Woodsball and many used pump guns or mechanical markers. The fields played on were big and usually played oven natural terrains. After 1995, the fields started getting smaller and more standardized, with inflatable bunkers and sometimes included artificial surfaces. After 1998, tournament circuits like the PSP, Global Paintball League, and Mid Atlantic Paintball League got bigger and bigger, with more teams competing every year. Old school markers include stock guns, pump guns, and low-end mechanical markers. New school fields and technologies include high-end mechanical markers and speedball fields.
  
  
• Overshoot - When a player continues to shoot at another player even after he knows that he has eliminated him. Overshooting is also known as bonus balling, starred, and overkill.
  
  
• Outlaw - term used for playing on any land where the players do not have permission. Outlaw paintball is becoming illegal in most, if not all states in America.
  
  
• Operating Pressure - The pressure of the gas used to actually propel the paintball down the barrel. Typical operating pressures range from 200-850 psi.
  
  
• Open Bolt - When the marker's trigger is in a neutral (not-pulled) position, the bolt is in a rearward position leaving the breech open to allow paintballs to feed. When the trigger is pulled, the bolt moves forward, pushes the paintball into the barrel, and seals off the barrel just as the propellant gas is released to fire the paintball out of the barrel.
  
  
• Out - another way to describe a player who is eliminated. Out can also be called tagged, marked, as eliminated.