no, but the missile fires on your cruise disruptor key (middle mouse button/scroll wheel in my case).
people have different setups, but the way I do it is like this (I use it on snubs too, so its universal):
Weapon group 1: Secondaries
Weapon group 2: 4 x Primaries
Weapon group 3: 2 x Primaries (for when I want to preserve energy)
Weapon group 4: Empty
Weapon group 5: Cerbs (and I have "Fire Weapon Group 5" mapped to my mouse's thumb button so I can fire cerbs while I have primaries selected)
Weapon group 6: Flaks (mapped to another mouse button so I can always fire it quickly)
So you can use the weapon groups and the "Fire Weapon Group" key setting in the options menu to map it to a button that suits you.
