|The Deer Hunter, Dave MacDowell|
Something like this, though I'm not wedded to these specific numbers:
There would then be only 2 other modifiers: Concealed and Gone-To-Ground.
So, is this simple enough? Or is it too complex to consider?
EDIT: Ooops! I left out that each weapon would have it's own individual maximum range. The range bands are only for to-hit purposes. Very few pistols, for instance, would be able to shoot past 24". :)