I found a Ruger 10/22 at a local pawn shop for $129 and was wondering what kinds of things I should look for.

Here's what I know:
  • It's got a beautiful wood stock with some scratches
  • Blued barrel with some minor rust spots
  • Length of pull is longer than others (actually fits me )
  • Does not come with a magazine
  • action feels solid and smooth
I wasn't able to see into the bore and plan on getting a bore light to look down it before I buy, but I've never figured out exactly what to look for. I know the rifling should have crisp edges, but what does "pitting" look like? Is it on the rifling or in the grooves.

Any help or advice would be appreciated!