我发现还有这样的法律保护患者～～

http://www.ncsl.org/research/civil-and-criminal-justice/possession-of-a-firearm-by-the-mentally-ill.aspx

【Federal Law
Under 18 U.S.C. § 922(d), it is unlawful for any person to sell or otherwise dispose of any firearm or ammunition to any person knowing or having reasonable cause to believe that such person “has been adjudicated as a mental defective or has been committed to any mental institution.” 】