JAS-39 GripenJAS 39 Gripen airplane model. The JAS 39A represents the single seater variant of the Gripen, while the JAS 39B is a two seater operational trainer version. The JAS 39B shares the same avionics and weapons suite as the JAS 39A, except for the gun. The JAS 39C is the single seat Batch 3 and export standard version, first delivered to the Swedish Air Force in September 2002, featuring color cockpit displays, an on board oxygen generation system (OBOGS),