* Note this is the upgraded version with output power of 16 joules and we do not recommend using paintballs as they can burst in the chamber. Designed for simple operation and immediate readiness for use, the HDB 68 features a high-capacity internal tube magazine and the proven Quick-Piercing System. With a light blow at the bottom of the grip you can pierce the CO₂ cartridge right when you need to fire. Long-term storage and quick availability no longer rule each other out. The double-action trigger permits rapid firing of the sixteen .68 caliber rounds. Picatinny rails let you mount aiming aids and other accessories. For precise firing the sight radius extends over the entire length of the 330 mm barrel. Suitable for the wide range of Umarex T4E roundballs.