Investors can sometimes get sidetracked by the media. As early as late 2009, some in the media were wondering if the firearm-sales boom was over. The question is back in headlines. Trend guessing, though, is an iffy way to guide investments. A stock's chart is more useful than anybody's guess about the future. So let's look at the charts of the firearms stocks. Sturm Ruger (RGR) cleared a 48.16 buy point in November and rose 15% in less than two