The Tails of the Dragon

A model attacking with this weapon Piles-in and fights at Initiative step 1, unless it has the Dreadnought Unit Type or Monstrous sub-type.

Weapons with the Master-crafted special rule allow the bearer to re-roll one failed roll To Hit per turn with that weapon.

If a model with this special rule, or attacking with a weapon with this special rule, rolls equal to or higher than the value in brackets when making a To Hit roll as part of a melee attack, that hit is a ‘Precision Strike’. For example, if a model with the Precision Strikes (4+) special rule rolls a 4 or higher when making a To Hit roll, then that attack is a Precision Strike.
Wounds from Precision Strikes are allocated against a model (or models) of the attacking player’s choice in the target unit, as long as that model is engaged in combat with the attacking model’s unit, rather than following the normal rules for Wound allocation.