Here's a synopsis of expungement laws
http://www.legaltechcenter.net/10th-..._laws_2014.pdf
From conversations with my friend in a similar situation in Park County, I don't think Montana expunges felonies unless the conviction has been over turned in court, which yours and his hasn't. The application to purchase a firearm is Federal, so you'll likely have always have a problem passing that litmus test. I'm sure you're aware of this finding, which solidified the Feds hold on Montana (and other states ) gun laws. Previously, if a person had completed his sentence, Montana granted gun rights to felons. But the 9th Court has found that Fed laws apply also.
http://billingsgazette.com/news/stat...a223a111d.html

