18 Pa.C.S. § 6104: Evidence of intent.

In the trial of a person for committing or attempting to commit a crime enumerated in section 6105 (relating to persons not to possess, use, manufacture, control, sell or transfer firearms), the fact that that person was armed with a firearm, used or attempted to be used, and had no license to carry the same, shall be evidence of that person's intention to commit the offense.