 as the marker physically resembles an M16 and M4 U.S. Military assault rifle and carbines.The markers provide crowd control and are an alternative method for subduing individuals; the markers can fire .68 caliber Less Lethal Live Rounds, more commonly known as pepper balls - live rounds filled with powder substance that irritates the eyes and nose, similar to pepper spray.The T68 core is a design similar in action to the Spyder markers.