What is the current state of the law on firearms possession in criminal cases?

The district court below adopted the facts and conclusions of the presentence report, which stated that "[t]he facts in this case suggest that it was clearly probable that the weapons were related to this offense and certainly 31 firearms, some of which were semi-automatic handguns and at least one being loaded, clearly reflect an increased danger of violence such as the commentary suggests." Excerpts of Record, (E.R.) at 23. By appellant's own admission in his statement to the officers, and in the presentence report, he had been involved in the drug trade for two or three years and some of the guns found at his place of business belonged to him. The district court's findings may be reversed only if they are clearly erroneous. United States v. Heldberg, 907 F.2d 91, 93 (9th Cir.1990).