This is AK-47 shaped water gun. This gun uses air pressure. It is have average range, but have very low output. (range 7~9 meters, output 4ml/sec.)
This is fire extinguisher water gun. this water gun is very tiny and have low capacity. Price is 3900 KRW at one pack. (maybe 3.9 USD) And 5 guns is a pack.
This water gun call by “police water gun”. (In Korean, 경찰물총[gyungchal mulchong].) This gun has bad stats. (range 7m(in 45 degree) capacity 0.9 liters)
This water gun call by “firefighter water gun”. it have 2 nozzles(single shot, triple shot.) but it have bad range. (in single shot, 5 meters and in triple shot, 3 meters.)
All of Korean water guns are have bad outputs.
But I think 60% of Korean water guns are have good capacity.