Affixes

Swift
Swift increases your Speed by 5% as long as the weapon is in your hand.

Affinity
Affinity increases a certain stat by 2 as long as the weapon is in your inventory.

E.g. An Assault Affinity boost your Assault Stat by 2, giving a 10% damage increase.

Versatile
Versatile changes the type of the weapon depending on the stat which is currently higher. It only scales the damage with that higher stat.

E.g. an Assault/Technology weapon is Assault because Assault is at 5 while Technology is at 3. Its Damage buff is then 25% because of the level 5 Assault.

Mark
Mark applies the Mark effect on all hit enemies.