21 Guns

21 Guns or Twenty-One Guns may refer to:


 * 21-gun salute, an arms salute as a military honor
 * 21 Guns (band), a 1990s rock band formed by Thin Lizzy guitarist Scott Gorham
 * "21 Guns" (song), a song from Green Day's 2009 album 21st Century Breakdown
 * "Twenty-One Guns" (ER), a 2006 episode from the 12th season of the medical drama ER
 * "Twenty-One Guns", a song on the 1996 split EP Ignite / Good Riddance