Perhaps you might want to put a good soak on the OPFOR inside a bunker with this Ikeda Industries Water Balloon Bazooka available at Amazon Japan. It is 26.2" long and already comes with 20 water balloons as part of the starter kit. It is made of ABS and has a maximum range of 10 metres. Mach Sakai got one to find out if it is fun to use.
Mach Sakai brings a heavy one for a quick steel challenge at his range, the A&K MK43/M60 Light Machine Gun. Weighing at aorund 6.8kg its box magazine has a capacity of 2,500 rounds and is based on the M60E4. This is available for some years now and can be ordered at most reputable airsoft retailers.
