Accuracy International is a specialist British firearms manufacturer based in Portsmouth, Hampshire, United Kingdom, and best known for producing the Accuracy International Arctic Warfare series of precision sniper rifles. The company was established in 1978 by British Olympic shooting Gold medallist Malcolm Cooper (1947-2001), and its high-accuracy sniper rifles are in use with many military units and police departments around the world. AI unveiled their new AS50 .50BMG calibre semi-automatic rifle at the 2005 Las Vegas Shot Show.