OP is a term that is use waaaaaaaaayy too much. It's been used (by both trolls and scrubs) to the point that I have kinda forgotten its meaning. Does it mean everything is OP? Does it mean something as ridiculously weak as the Wrap Assassin is OP? If one pays attention to the stats, everything (besides direct upgrades, like the Third Degree) is balanced, because most weapons are side-grades (by 'most', I mean a few are upgrades and others are down-grades).