Welcome to Librarium Online!
I know this is a dumb question but I can't find anywhere in the codex that gives me an answer so here goes: If I pay for an EML on a unit, do I get to decide every time I fire if I'm using krak or plasma, or are those two separate weapons? I always assumed it was one or the other for the entire match, but after looking at some other posts, I think I was wrong. So which is it? Thanks.
you decide each time you fire..
Hight elf and Craftworld Eldar army project pics heavy: linky
niraco's spot on.
it's one weapon, which can be fired with either of it's profiles. so all you're doing before the game is deciding to equip that weapon. once you have it you can chose how to fire it each turn.
That's what I thought, thanks guys.
And one other note. If you fire the Plasma Missile, it's S4 and thus a 'defensive weapon'
Meaning you can shoot a nose mounted Shuriken Cannon AND the S4 Plasma Missile when moving up to 12"