Unlike most combi-weapons, the bolter / bolter arrangement is
configured to fire both mechanisms at once for a high but
unreliable rate of fire.
Special Ammunition for this weapon costs twice as much as normal, because
you need twice as much of it.
Pistol: Pistols can be used to make ranged attacks, and can also
be used in close combat. If a Pistol has an Accuracy modifier, it
applies to ranged attacks only.
Rapid Fire (X): When firing with a Rapid Fire weapon, a successful hit
roll scores a number of hits equal to the number of bullet
holes on the Firepower dice. In addition the controlling
player can roll more than one Firepower dice, up to the
number shown in brackets (for example, when firing a
Rapid Fire (2) weapon, up to two firepower dice can be
rolled). Make an Ammo check for each Ammo symbol
that is rolled. If any of them fail, the gun runs Out of
Ammo. If two or more of them fail, the gun has jammed
and cannot be used for the rest of the battle.
If a Rapid Fire weapon scores more than one hit, the hits
can be split between multiple targets. The first must be
allocated to the initial target, but the remainder can be
allocated to other fighters within 3" of the first who are
also within range and line of sight. These must not be any
harder to hit than the original target...for example if a target in the
open is hit, an obscured target cannot have hits allocated
to it. Allocate all of the hits before making any wound
rolls.
Rapid Fire also works in close combat when on a weapon that also has the Pistol trait.
Twin-linked: When a weapon with this trait scores at least one successful hit, add one additional hit to the total; if used in conjunction with an attack that uses a 3'' Blast marker the additional hit scatters D3+1'' from the center of the first hit, and if used in conjunction with an attack that uses a 5'' Blast marker the second hit scatters D6+1'' from the center of the first hit. Additionally when a weapon with this trait makes an ammo check two dice are rolled and the lower die is kept.