Federal tax revenue on the sales of firearms and ammunition rose 45 percent in the last fiscal year. That is the highest annual increase on record, according to a new report from the Treasury Department's Alcohol and Tobacco Tax and Trade Bureau. By comparison, the annual average increase for fiscal years 1993 to 2008 was 6 percent. Here's a chart showing millions of dollars of firearms and ammunition excise taxes collected at the federal level over the last... (GunPolicy.org)