Get Staged up and ready for fast action with the T4E GLOCK 17 Gen 5 Quick Pierce .43 caliber Paintball Magazine. This magazine holds 8 .43 caliber paint or dust balls as well as a pre-staged 12g CO2 capsule. When ready to change out magazines, simply drop the spent magazine from the pistol, store away the spent mag, and insert your Quick Pierce magazine into the mag well. Give the bottom of the magazine a firm swat and the piercing mechanism will activate the CO2 and you are ready for more mag-fed paintball action.