K Modification

Tools/items needed:

-Philips screwdriver
-12 inch Helium Balloons (Usually party balloons)

The K Modification is a power mod that is done to CPS blasters with a spherical firing chamber (the one shaped like a bulb). Mainly smaller ones like the CPS 1000, 1200 and 2100. In the early days of it many balloons used to be put on (30+), which would result in needing to cut off the pressure relief valve in the blaster. If you are unfamiliar, then this part is used to limit the amount of pressure a water gun can take safely without it exploding or something failing whilst pumping it to full. Basically it acts as a limiter, you cut it off and seal it then that limiter is gone, however chances are you’ll shorten the life of the blaster or have a massive trouser accident.

Because of this, light K Mods are more widely used today (30 balloons or less), as this way the Pressure Release Valve doesn’t need to be cut off and disabled, while also giving your smaller CPS blaster a nice boost that it can tolerate. This is what we will be focusing on today, yep, you guessed it, the Super Shooter CPS 2000 that I have been going on about modding!


First of all, you need to take out the pressure chamber from the blaster once opened with your Philips screwdriver.


Then take the casing off, in which what we will be working on shall be revealed.



We then need the balloons, which we are going to be fitting and layering over it.  12 inch helium balloons are recommended which is what I used.  A lot of them say Party Balloons on the packaging.


The balloons will need to have the front narrow end part cut so they can stretch over the bladder one by one.  You also don’t want stretch them over too far so they interfere with the casing, otherwise you won’t be able to close it, or close it but then have it crack/shatter when pumping.  Trust me it has happened to me before and it is not the best of experiences.


As you can see we will need a reference point of roughly the maximum distance we can stretch the balloon over without interfering with the casing when closing.  The raised bit of rubber seam near the front on this example was perfect; the next picture is a line going across explaining it.


Next we will be getting the bladder ready and secure in the vice for the balloons to go over easy.


With each balloon cut to the right length, stretch it over.


Then repeat the process, I marked the number every so often.


I put 19 balloons on in the end, it was going to be 20 but one of them ripped apart when fitting it over, oh well, 19 out of 20 ain’t bad I suppose and performance wise it will still be an improvement.


Now to put it back in the casing, as you can see while a bit messy, it goes in without interfering with anything.


Then with a good grip and all the ridges of the chamber lining up correctly (make sure they all line up, this is important, and might be why you find it won’t fit on right), start screwing the chamber back together, with each screw creating a nice hold so you don’t have to hold your fingers clamping it as much.


Then it is just a matter of putting your blaster back together.  Pump it up and you should receive a nice little performance boost if you did it right!  It might be a bit harder to pump as there is more pressure now.  You will also need fewer pumps to full, as this increase power will reduce the firing chamber capacity as the layers of balloons will reduce the area covered inside the chamber since it is now larger.