I have attempt to get the achievment for a while now and haven't been able to get it. I have 5/6 clases at lvl 25, all the hand pistols at max lvl and 4/5 melee weapons at max lvl. I have played the main campain on max dificulty and all PvE missions on Ruthless as well getting the "Kill 41,000 enemies" achievment" All and this achivement being stuck on 48/50 finishers. Im well aware that its obtain by executing enemies which I have. I need help with this.