рекомендую ознакомится с правилами
Кубик со стрелочками это скаттер дайс к роллу ту хит отношение не имеет совершенно никакого
Scatter Dice
Warhammer 40,000 uses a special dice called a scatter dice (marked with arrows and a Hit! symbol). This dice is mostly used to determine a random direction, most often
applied when working out the behaviour of blast weapons, such as mortars and battle cannons.
Вот это ролл ту хит
ROLL TO HIT
To determine if the firing model has hit its target, roll a D6 for each shot that is in range.
Most models only get to fire one shot, however, some weapons are capable of firing more
than once, as we’ll explain in more detail later. The dice roll needed To Hit will
depend on how accurate the firers are, as shown by their Ballistic Skill (or
BS). The chart below shows the minimum D6 roll needed to score a hit.