Readying a Weapon
This can involve drawing a weapon or reloading a gun with a prepared clip. In most cases, no roll is required, so long as the character takes no other action that turn.
If the character wishes to ready a weapon while doing something else in the same turn, the player must reduce his dice pool (see “Multiple Actions,” p. 248 -- VTM 20th Edition) and roll Dexterity + Melee or Firearms (difficulty 4) for the readying attempt.