Patent ID: 7735479

Claim:
A paintball marker apparatus for launching a paintball, the apparatus comprising: a main body defining a main gas chamber and a breech; a bolt positioned at least partially inside the main body, the bolt defining an internal surface with an impact ring; a power tube sized to fit within the bolt, the power tube defining an internal passage to direct gas from the main gas chamber toward the breech, and an external surface with a striking surface, wherein the striking surface of the power tube is sized to contact the impact ring of the bolt; and a main seal positioned to selectively seal to the internal passage of the power tube from the main chamber, wherein movement of the bolt causes the impact ring to contact the striking surface to unseat the power tube from the main seal to release gas from the main gas chamber through the internal passage into the breach to launch the paintball. a valve; a main gas passage flowably connected to the main gas chamber or to the valve; a bolt chamber housing the bolt; a controlling gas passage flowably connecting the valve to the bolt chamber; and an atmospheric pressure passage flowably connected to the valve. wherein the valve flowably connects the controlling gas passage to the atmospheric passage.