So I got bored one day, and sat down and made a character for deathwatch with the idea of maybe some day getting to use him. He is a Librarian and a Kill Marine. My idea is he largely roams from one planet to another hunting down xenos and heretics. Regardless of who he is fighting alongside one weapon that I really liked the idea of is the Immolation Rifle. Think of it as essentially being a slightly longer range flamer that's easier to reload, but doesn't damage mechanical targets and doesn't actually light things on fire. I then got the brilliant idea of wanting to make my librarian model I'm making for my army be this exact guy. Problem is I'm not sure how exactly I would make an Immolation rifle for a marine. The Inquisitor with the obvious flaming rifle would work but that will take a lot of time and effort plus might still not be the right size. After all it is supposed to have more range than the normal flamer.
So I'm curious to see if anyone else has any ideas that might work. So far I'm thinking mixing the front end of the flamer with a melta gun or plasma gun and then using a little greenstuff to make the conversion less obvious. I also plan on later adding a chainblade attachment underneath the gun but that'll be some time off.