Umarex T4E Glock 17 .43 Cal 8rd CO2 Quick Pierce Paintball MagazineThe T4E GLOCK 17 Gen 5 Quick Pierce . 43 caliber Paintball Magazine will get you in the action fast. This magazine holds eight . 43 caliber paint or dust balls as well as a pre staged 12gram CO2 cartridge. 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