The GSG-5 is a semi-automatic rimfire rifle chambered for the .22 Long Rifle cartridge. It is built by German Sport Guns GmbH, an airsoft wholesaler located in Ense-Höingen, Germany. It was unveiled at the IWA & Outdoor Classics trade show in March 2007 following the legalization of previously forbidden military-style weapons in Germany. The GSG-5 utilizes the H&K style drum sight that is adjustable for windage. German Sport Guns provides a weaver rail attachment that slides onto the top of the frame, allowing other sighting systems to be added. Lawsuit Fake Suppressor Reclassified