To reinstate the final rule issued by the Social Security Administration entitled "Implementation of the NICS Improvement Amendments Act of 2007".

Strengthening the National Instant Criminal Background Check System Act of 2018 This bill reinstates the “Implementation of the NICS Improvement Amendments Act of 2007 ” rule finalized by the Social Security Administration on December 19, 2016. The rule implements a plan to provide to the National Instant Criminal History Background Check System the name of an individual who meets certain criteria, including that benefit payments are made through a representative payee because the individual is determined to be mentally incapable of managing them. (Current law prohibits firearm sale or transfer to and purchase or possession by a person who has been adjudicated as a mental defective.)