Keeping Guns from High-Risk Individuals Act This bill expands the categories of persons who are prohibited from receiving or possessing a firearm or ammunition. Specifically, it adds the following new categories of prohibited persons: persons convicted of a crime of violence in the most recent 10-year period; 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; 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 persons convicted of stalking.