t4e tb 68 gen 2Tactical power and impressive shotgun action in one upgrade. The T4E Tactical Blaster TB 68 Gen2 is a powerful and user friendly . 68 caliber CO powered marker , created for MagFed paintball, training and self defense scenarios. Generation 2 offers significant improvements in both function and ergonomics including the new Quick Piercing System 2. 0 , which activates the CO cartridge with a light blow and provides full power even after extended storage