The National Rifle Association of America (NRA) is a gun rights advocacy group based in the United States. Founded in 1871 to advance rifle marksmanship, the modern NRA has become a prominent gun rights lobbying organization while continuing to teach firearm safety and competency. The organization also publishes several magazines and sponsors competitive marksmanship events. According to the NRA, it had nearly 5 million members as of December 2018, though that figure has not been independently confirmed.

The NRA is among the most influential advocacy groups in U.S. politics. The NRA Institute for Legislative Action (NRA-ILA) is its lobbying division, which manages its political action committee (PAC), the Political Victory Fund (PVF). Over its history, the organization has influenced legislation, participated in or initiated lawsuits, and endorsed or opposed various candidates at local, state, and federal levels. Some notable lobbying efforts by the NRA-ILA are the Firearm Owners Protection Act, which lessened restrictions of the Gun Control Act of 1968, and the Dickey Amendment, which blocks the Centers for Disease Control and Prevention (CDC) from using federal funds to advocate for gun control.

Starting in the mid-to-late 1970s, the NRA has been increasingly criticized by gun control and gun rights advocacy groups, political commentators, and politicians. This criticism began following changes in the NRA's organizational policies, following what is now referred to as the Revolt at Cincinnati at the 1977 NRA annual convention. The changes, which deposed former NRA executive vice president Maxwell Rich and included new organizational bylaws, have been described as moving the organization away from its previous focusses of "hunting, conservation, and marksmanship" and toward a focus on the defense of the right to bear arms. The organization has been the focus of intense criticism in the aftermath of high-profile shootings, such as the Stoneman Douglas High School shooting and the Sandy Hook Elementary School shooting, after which they suggested adding armed security guards to schools.