Off-set Sight Rail
This is a sight rail that (instead of mounting the sight inline with the marker's body) allows the sight to be mounted either to the right or the left of the marker. This is usually necessary if a marker has a vertical feed.
On-off Valve
A valve on a C/A tank that also has an integral on/off dial that
allows, obviously, for the user to turn on or turn off the air supply. Some
players prefer this type of valve as it allows them to degas their marker
without having to unscrew the tank. The on-off valve may or may not also
have a pin valve in it.
On/Off valve with no pin valve.
Open Bolt
The basic description of the more common type of semi-automatic
action. It is referred to as open bolt because the bolt remains in the
rearward position between shots.
This is also the description of a blow back semi-automatic. The terms are interchangeable, and correctly so, as an open bolt semi is usually a blow back semi and vice versa.
O-ring
A rubber, neoprene or nylon ring used to seal areas, usually a cylinder fitting
into a tube. O-rings are usually the primary air seals on any paintmarker
or constant air tank. The o-rings allow the tolerances between the two
objects the are placed be a little less precise. O-rings are also used to
secure some barrels plugs in the muzzle of the paintmarker.
THe lighter colour o-rings are neoprene, the black ones are rubber.
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All of the articles in the "virtual book" Durty Dan's Paintball Information Services are free to use for webpages, school projects, reference and to promote paintball to players and the non-playing public. Credit for the source of the information should be included in the bibliography or references page.
© Durty Dan Enterprises 2000. All rights reserved. All works contained herein are under copyright of the author Durty Dan. While the Terms of Use are broad they do not include the right to republish this work in any publication (hardcopy or electronic) for the purposes of personal financial gain.
