The Gremlin 2 is a main battle tank under development by Avantis of Sierra. The Gremlin 2, a development of the Gremlin 1 platform is a next-generation MBT, and is believed to be one of the most modern tanks in existence. Several Gremlin 2 prototypes have been produced since 2012, with production likely to commence in 2017. THe Gremlin 2 will be the first production hybrid-electric tank in the world.