Tokyo Marui announced that the M320A1 grenade launcher will release in Japan on 09/11 with an prize of ￥27,800 which is about ~ 214€ or ~ $286.
The package includes:
M320A1, 1 grenade, protective cap, manual, BB loader adapter, BB loader XL adapter, BB release rod, cleaning rod, M5 set screw, next-generation electric gun mounting hex wrench.
A unique feature on the M320A1 is, that the gas tank & firing mechanism is stored inside the grenade launcher it self! Tokyo Marui guaranteed 18 shots with the grenade if the gas tank is fully filled up.
If you´re hungry to learm more about this new product, visit their website: http://www.tokyo-marui.co.jp/products/gas/gasshot_grenade/300 for more details. But if you´re not good with Japanese, you should translate the website into english or the language you prefer!