Raise the Age Act of 2023 This bill establishes new restrictions on the sale or transfer of certain semiautomatic firearms to individuals under 21 years of age. Specifically, this bill makes it unlawful for a licensed gun dealer, importer, manufacturer, or collector to sell or deliver a semiautomatic center-fire rifle or semiautomatic center-fire shotgun that has (or has the capacity to accept) an ammunition feeding device with a capacity of more than five rounds to an individual who the licensee knows or has reasonable cause to believe is under age 21. The prohibition does not apply if the individual under age 21 is a full-time law enforcement officer or active-duty member of the Armed Forces. The bill also requires the Federal Bureau of Investigation to report on the operation of its public access line, including a description of information sharing protocols and recommendations for improving such protocols.