Okay, I'm trying to figure out exactly how this works. It would be cool to play a mage that could wipe out all the guns in a 6-meter radius without causing any other collateral damage, but I'm not going to bother unless the guns are completely destroyed. So...
1. What's the OR of a gun?
2. How many structure boxes does a gun have?
3. What's the armor rating of a gun? This one is more important for the Sludge (Gun) spell.
Are there any solid stats out there, or is it all up to the GM? If it is a GM judgement call, what do you all think?