To determine if the firing unit has hit its target, roll a D6 for each shot. Normally troopers will only get to tire one shot each. However, some creatures or weapons are capable of firing more than once, as we'll explain in more detail later. The dice score needed to hit will depend on how accurate the firers are (as shown by their Ballistic Skill characteristic or BS). The chart below shows the minimum D6 roll needed to score a hit.

For example, if the shooters are a unit of five Space Marines with a BS of 4, you would roll five dice and each roll of a 3 or more would score a hit.

To hit rolls are easy to remember if you just subtract the BS of the shooter from 7. This will give you the number you need to hit, eg, a model with a BS 2 needs 5 or more (7 - 2 = 5) on a D6 to hit. As you can see, the minimum dice roll needed to hit is always at least 2. There is normally no such thing as an automatic hit and a roll of a 1 always misses.

When a unit fires roll all of Its To Hit dice together. Sometimes there will be different weapons firing, or firers with different BS in the same unit and you might find it convenient to use different coloured dice for them so that they can be picked out. For example, you could use green dice for all shots with plasma weapons and red dice for all shots with melta weapons. Alternatively, you can simply make separate dice rolls for different weapons or shooters, but as long as it's clear which dice rolls represent which shots you can use any convention for this that you like.