I think I could replicate the sound, but I would be thinking of something a bit beefier than what is used in Iron Sky. I'm yet to suss out the MIR particle cannon, as I'm just trying to find out which sound it is!
Edit:- Just found it now... reminds me a bit of the Death Star in terms of the shape of the sound. I reckon I could do something similar!
The gauss cannon will be relatively simple to recreate in terms of its architecture and being a single shot weapon. However, the particle cannon will be tricker as it will depend on if you want a sound constructed in the style of beam weapons, or if it is just going to be one whole sound for a weapon that only fires occasionally at massive targets to cause total destruction. So, please could you give me some specs on how dynamic you would like the sound in terms of whether the sound needs to vary its discharges or not?