So I think I saw this movie 8 years ago on Netflix. It’s in English and in color.

It starts with the main character a grocery store clerk/stalker talking about how he has started carrying a gun and how strong it makes him feel.  Later his friends also get guns and they create a shooting range  in a mine.  The film ends with all the kids with guns in a shootout with authority helping a old woman cross the street. I also remember the main character having a love affair with his revolver…?