Semi Automatic
Semi-auto markers use a variety of designs to automatically cycle a bolt and load a new paintball into the chamber automatically, with each trigger pull. This frees the player from manually pumping the marker, increasing rate-of-fire.

Full Automatic
The Tippmann SMG 60 was the first fully-automatic paintball marker. As the name indicates, the marker will continue to fire automatically so long as the trigger is held down.

Pump Action
Pump action markers must be manually recocked, much like a shotgun. This manual action is slower than other configurations, but is preferred by many people over semi-automatic markers as a challenge to themselves to learn how to play with less firepower.

Stock Class
Very few fields or tournaments require full stock class compliance and instead use what is commonly called "Modified Stock Class" rules. These rules usually allow constant air (CO2 or high pressure air) instead of 12 grams, feed tubes that hold more than 20 paintballs (horizontal or inclined) or even hoppers, and allow porting on the barrel. The only requirement is that markers be pump action only, and that no sights may be used. Different fields can allow or not allow rules as they see fit.

Paintball Gun
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