A pneumatic assembly for a paintball gun preferably includes a bolt slidable between an open and a closed position. The bolt preferably provides a firing mechanism for the paintball gun by permitting compressed gas to flow through the bolt to fire the paintball gun when the bolt is closed but preventing...http://www.google.fr/patents/US7044119?utm_source=gb-gplus-shareBrevet US7044119 - Pneumatic assembly for a paintball gun
