Keeping Guns from High-Risk Individuals Act This bill amends the federal criminal code to expand the categories of prohibited persons (i.e., persons who are prohibited from receiving or possessing a firearm or ammunition) to include the following: (1) persons convicted of a crime of violence in the most recent 10-year period; (2) persons under age 25 who have been adjudicated as having committed an offense that would have been a crime of violence if committed by an adult; (3) persons convicted, during a consecutive 3-year period in the most recent 10-year period, of two separate offenses involving drug or alcohol possession or distribution; and (4) persons convicted of stalking.