Talk:Scattered Justice/@comment-2131141-20141027093457

"Note: The Weapon-Specific Mods earned through Syndicate Standing have experimental bonus effects that we will be developing further based on feedback. The experimental bonus effect is: While having a Syndicate Weapon Mod equipped, its XP gained will fill up a Syndicate specific meter. When this meter is full it discharges granting some AOE and temporary bonuses!"

From patch notes. So I guess Justice and other such stats allows for some kind of ultimate skill to be used or something.