out one of the SOG's new developments, a revolutionary rocket pistol called a "Gyrojet". In one test, a rocket round punched through an old truck door and into a water-filled 55-gallon drum, almost exiting its opposite side. SOG men also test-fired it through sandbag walls and even tree trunks. See also References External links gyrojet.net Gyrojet www.deathwind.com/project.htm The Deathwind Project. Archived link– updated versions of the original concept www.deathwind.com/review_5.htm Rocket Pistols in Vietnam Archive link – David Kirschbaum's recollections of actually carrying and using one in combat "Deadly Zip Gun for the Missile Age", LIFE, 27 May 1966 Patents Testing GYROJET Rocket Guns – Why were they a commercial failure? Video includes high-speed photography of rounds in flight. Caseless firearms Firearms of the United States Rocket launchers Underwater firearms