As written in the GM Guide Page 74:
Monsters can themselves DODGE and, if they wield aweapon, also PARRY.
Does this mean that for example the Death Knight (pages 86-87) parries with twelve dice plus 2 dice from the Gear Bonus for a longsword?
You can parry with other weapons too, just with a -2 modification.Death Knight is meant to parry.
I know the book says if a monster has a weapon they can parry, but I read it to mean if they have a parrying weapon. Just like a PC, you can only parry with weapons that can do so, like swords. A club isn't a parrying weapon, whether for a PC or a giant. Plus if they could you'd never be able to touch the giant, heh.