Hello internets! I was up in beautiful/rainy Cairns (tropical North Queensland) all last week with work and apparently forgot to prepare a post before I went away. Therefore our mod today is incredibly simple.
Like most air powered blasters, the Nerf Hyrdo Cannon is really easy to single, basically just jam a barrel on the end of it and away you go. Yes I’m aware that the Hydro Cannon is actually a waster blaster but since said water is just propelled by pressurised air, the same pressurised air can be used to fire a dart pretty easily.
Phillips head screwdriver
Dremel with cutting disc (hax saw or pipe cutter would also work)
15mm PVC coupler
We’ll start off with the blaster in question.
Nerf Raider for scale.
Start by removing the pump handle.
Then the end cap.
Then all the screws along the side of the blaster so we can open up the shell. The water tank will stay with the right hand side of the shell unless you cut the string that holds the cap on, but that’s ok.
As always, have a look around the internals and familiarise yourself.
Ok, time to continue with the disassembly. Remove the two screws right at the front of the blaster that holds the front cover on.
I’ve removed the whole tank assembly here but it’s not necessary. Glue your 15mm PVC coupler on the end of the barrel, it fits surprisingly well.
Your blaster should now look like this.
Put the other side of the shell back on and screw it in to place.
Take the end cap.
Arrange it like so, with the flat part in the middle above the centre post.
Then place it over the end of the blaster.
Screw it in to place.
Then glue it into place. In this case I’ve used 600mm of conduit nested in about 400mm of PVC, but that’s way overkill.
Insert the barrel inside the coupler. Raider included for scale again.
Now make no mistakes here, the 60cm barrel was basically for waving at people. It’s way too long to get the most power out of the blaster, but given that it takes approximately 50 pumps with the stock pump to fill the tank anyway, this was never going to be practical. Really it’s entire purpose was to be big, and I think it achieves that.