Amends the Consumer Fraud and Deceptive Business Practices Act. Provides that it is an unlawful practice within the meaning of the Act for any firearm industry member, through the sale, manufacturing, importing, or marketing of a firearm-related product, to: (i) knowingly create, maintain, or contribute to a condition in Illinois that endangers the safety or health of the public by conduct either unlawful in itself or unreasonable under all circumstances, including failing to establish or utilize reasonable controls; (ii) advertise, market, or promote a firearm-related product in a manner that reasonably appears to support, recommend, or encourage individuals to engage in unlawful paramilitary or private militia activity; (iii) advertise, market, promote, design, or sell any firearm-related product in a manner that reasonably appears to support, recommend, or encourage persons under 18 years of age to unlawfully purchase or unlawfully possess or use a firearm-related product; or (iv) otherwise engage in unfair methods of competition or unfair or deceptive acts or practices declared unlawful under the Act. Provides that the provisions of the amendatory Act are severable. Defines terms. Effective immediately.