Brotherjulian wrote: To state the obvious here, you can do some very nice conversions gluing together boltguns and plasma pieces if you find the right bits and use a little sense joining them. I have a lot of the 2nd ed Ork bolters I like to use for this because they're a bit bulkier than marine bolters. Just try to keep it looking like a gun ie, bolter barrel stays in line and has a magazine where it could feed it.
I think I made one once by slicing a plastic plasma gun in half so I had the bottom half of the plasma gun (with the barrel tip) Then I cut the top half off of a bolt gun (with the bolter barrel) and glued it on top. Then I stuck the bolter magazine out the side like a Sterling smg