[Jedi Marksman]

Basically realism mods, to my understanding, change the hit point damage of a weapon based upon it's type and where bullets impact. For example, a rifle shot to the foot will not kill your opponent like in some games, it will only cause damage. You have to hit him/her in their torso or head for a fatal shot. Also realism mods can effect movement in relation to what weapon you're using. A soldier with a bazooka will move slower than a soldier with a rifle, a soldier armed with a pistol will be able to move faster than a soldier with a shotgun, etc. Hope this clarifies it a bit.