The G-11 is the future of caseless ammo weapons. It is not new because they were advertising the thing twenty years ago, but they got a DOD contract and shut up. The government is just waiting for the right time to release the rifle. The main problem was overcoming the extreme heat and cook-offs that occurred because brass cases, which the rifle lacks, act as a heat sink.
http://www.world.guns.ru/assault/as42-e.htm