T4E Walther PDP .43 Cal 8rd CO2 Quick Pierce Paintball MagazineQuick Piercing Magazine for the T4E Walther PDP Series . 43 Caliber Training Markers Overview: If using the T4E licensed Walther PDP for training in a demanding environment, the T4E PDP Quick Piercing Magazine is a must have. Like the factory magazine, the Quick Pierce design holds 8 rounds of . 43 caliber paint, dust, or rubber ammo, the difference being the Quick Pierce CO2 puncture mechanism. Just install a fresh CO2 cartridge in the magazine and