HK ARMY 68ci / 4500psi Carbon Fiber HPA Paintball Tank HK ARMY 68ci / 4500psi Carbon Fiber HPA Paintball Tank. Tags: 4500psi, 68ci, army, carbon, fiber, paintball, tank « TUXING 4500Psi Pcp Air Tank 0.8L 48Cu in 220cc Carbon Fiber HPA Tank for Rifle TUXING 4500Psi Pcp Air Tank 1.1L 67Cu in 220cc Carbon Fiber HPA Tank for Rifle »