Inverted Edge Tactics is part of the Modern Combative System designed by George “mercop” Matheis. The MCS system includes open hand combatives, sticks, edged weapons, and pistol within 7 yards.. Realizing that in many places and countries a citizen can only carry a folding knife, and sometimes just a slip joint, mercop has created an innovative, intuitive system allowing anyone with minimal training to cut an attacker off of them. This is not “knife fighting” silliness. It is part of the MCS mindset that your tools and tactics need to be like sharks teeth. If one fails, there is another right behind it. IET is brutal, yet defensible. There are no levels. There are no belts. There are no certificates. Just survival.