Really unfortunate that you had a crappy experience with the SC DNR, esp WRT folks marking their tracks in the buildings!
I'm no gun expert, but found this (see attached) on a hog-hunting website. Comments are by the author. Another fellow on the site ordered one with a .458 upper. The light is a feature common to Texas hog-hunters.
Thought it would be of interest, least it was to me.
Hog Hunting Gun.pdf