This Defender Utility Belt can carry 24 x 12g CO2 cylinder or 24 x 10 rounds tubes. This belt is a must have for those with pistols and pumps markers. You can quickly reload from the belt elastic loop as well as able to keep your ammo ready at all times. This utility belt is adjustable from 30" - 48".
The Real Action Paintball Defender Utility Belt is newer, so it should be commonly available, both new and used.