Well, may I can help you here a little bit:
To start with, the SS 300 is a quite SIMPLE GUN. The way from the PCs to the nozzle is JUST straight. THe water can accelerate till the nozzle comes, it also uses a ball valve, which also contributes a laminar stream.
Next thing is that the gun has a PC volume of incredible 1.5 l of pressurized water. Speaking of such a big volume means that, although the output is quite high ( more than 500 ml durign the first second of firing),the pressure holds about 1 second till it drops off rapidly, therefore we really get a punch of water out of the gun with maximum pressure, which is able to fly 50 feet + .
Furthermore the nozzl-size is rated very well and likely calculated. A bigger nozzle would let the pressure drop off to fast, a smaller noozle would mean that the stream is not thick enough to fly through the air 50 feet + .
And last but not least is the fact that THIS GUN DOES NOT HAVE A PRESSURE VALVE INSTALLED. This means, theoretically, you can create tremendous pressure, as long as you have the power to pump it up further. The pressure in the PCs is for sure 5 bar, or even more. But since the pump moves so much water / stroke you will lack the power to pump up further, also you can FEEL when the gun is filled totally, without being damaged. It is very fragile and since it is designed so simple, you might think it is not able to control this power.
But we can thrust Larami here, the gun really holds its maximum pressure without problems. The pump goes smooth and moves 80 ml of water each pump into the PCs. Average pressurize-time is less than 30 seconds.
--->But only as long as you use it as the manual says AND AS LONG AS You do not fall with this gun. To my mind there is nothing to break but the stupid trigger and it's area. The plastic is hard and will break immediately if forced sideway.
And really, I do not want to talk about the trigger-mechanism which is the fragilest part of all
Besides this it is a crazy gun without a PR-valve, what means the pressure can be increased without an end, but there is no guarantee how much it can handle, this says the gun may even explode if used not carefully(handling more than 80-100 PSI!)! -->quite dangerous for a toy for small children if you ask me^^
In short, a MONSTER gun with incredible power, water volume and range. Unbeatable and great without any problems when used with MUCH MUCH care
