Normally, I would just say no, they are not. But there are a few things that make me doubt.
- They are under the bolt gun section of the rule book
- Grey Knights can give anything that fires a bolt Psybolt ammo - making them part of the same family.
- They are often described as an upgrade of a bolt gun, hence why termies have them.
Thoughts?
I'm still going with a no, mainly because they cannot rapid fire. What do you guys think?