T4E Training Markers feature .43, .50, and .68 caliber Paint, Rubber, and Dust projectiles in a variety of product count sizes. T4E (Training 4 Engagement) are specifically designed for fast action with lightweight protective gear, these CO2-operated training markers guarantee truly authentic conditions in any scenario. Their higher energy, easy operation and often larger caliber make them the ideal training device for enemy actors or effective back-up markers for the paintball field.