After a good amount of attempts, we finally brought down the Ogre boss, but I didn't get a weapon/armor drop. Everyone else got 1 to 2 pieces of armor (no guns), and all I got was 1 Mouldering Shard. This was the first time any of us got armor/weapons (except me) from the whole raid so far with the exception of 2 people getting the Ghost from the prior boss. Are these bosses not guaranteed to drop weapons/armor?