Gawain said a UFC fighter would be superior to any other martial arts expert. No mentioning of mma. Firing a gun isn´t martial arts, kendo is.
So is fighting with swords in medeival armor. Lets be serious here

Mohammed Ali is a boxer. He wouldn´t stand a chance against a expert karateka or kung fu fighter for more than seconds.
UFC fighters generally have all these skills. Next you will want them to face noon chucks(sp)