Editing Pump-action paintball markers (section)

== Stock-class and open-class configurations ==

Pump-action markers may be configured for different forms of play.

=== Stock class ===

Stock-class configurations are associated with early paintball equipment.

They commonly use:

* A manually operated marker.
* A horizontal ammunition feed tube.
* A disposable 12-gram carbon dioxide cartridge.
* A limited ammunition capacity.

Some stock-class configurations require the player to tilt the marker to allow a paintball to enter the breech, a procedure commonly called '''rock and cock'''.

Precise equipment restrictions depend on the rules used by a particular competition.[2]

=== Open class ===

Open-class pump markers generally permit larger ammunition loaders and refillable compressed-gas cylinders.

They retain the requirement for manual pump operation between shots but are not restricted to traditional stock-class feeding and gas arrangements.

Some pump-action markers can be converted between stock-class and open-class configurations by changing their feeding systems and gas connections.