This is the T4E (Training 4 Engagement) TX 68 pump action .68 caliber paintball marker. This marker is powered by 2 x 12-gram CO2 cylinders housed under the buttstock. The internal magazine holds 16 .68 caliber paint, dust, rubber, or pepper ball rounds. This marker also features a pressure indicator to clearly indicate when the unit is charged and ready for use. This marker is rated for 8.7 Joules.