An ACS bolt is a special type of bolt used in some Paintball marker

Paintball marker

A paintball marker, also known as a paintball gun, is the main piece of equipment in the sport of paintball. Markers use an expanding gas, such as carbon dioxide or compressed air, to propel paintballs through the barrel. Some paintball players refer to the piece of equipment as a "marker" rather...

s. The purpose of the ACS bolt is to reduce the amount of chopping (when a paintball is pinched by the forward motion of the bolt, causing it to break) by using a system that detects when there is an obstruction in the chamber and brings the bolt back. Tippmann has a similar system on their model line called A.C.T., or "Anti-Chop Technology".

External links

• http://www.pbreview.com/products/reviews/3201/
• http://www.spyder.tv/section/products/emarkers/acs/index.html