Two columns of 10 rounds for a 20 round capacity. Shaped projectile and .68 Caliber ready. This magazine fed system actually loads faster than a Rotor. Automatic anti-dimple spring driven design for reliability through simplicity. Retention doors also protect the paintballs from the dirt and the weather. Easy tool-less cleaning by removing the access door and sliding out the bumpers and springs. The DTM-20's are MMC coupler ready.