The Gatling gun is one of the best known early rapid-fire weapons and a forerunner of the modern machine gun. It is well known for its use by the Union forces during the American Civil War in the 1860s, which was the first time it was employed in combat. Later it was also famously used in the assault on San Juan Hill during the Spanish-American War. File for 3ds Max 2011 and mentl ray renderer. File for 3ds Max 2012 and V-Ray ray renderer. File for Cinema 4D R14 and built-in renderer .