Well, sbell25's latest 12k got me thinking it was about time I k-modded another gun. With my not-so-recent acquisition (I know I spelled that wrong) of two CPS 2100s, I decided to k-mod one of them. In the spirit of sbell25's 1200, I opted for a light k-mod con CVF instead of my usual 75 balloons. This time I only used 26 (I believe, I lost count once it might have been 25 or 27), without a CVF. I made sure to keep track of all of the screws and label where they went. While the shell was off the gun, I also decided to go for a camo paint job. So far, I've painted the gun green, but will add a second camo layer later this weekend. I left the paint to dry for four hours before reassembling the gun. I am very happy with the results. The K-Mod did exactly what I hoped it would do, adding roughly five feet of range to the 2100. It kept a laminate stream and also did not suffer any decrease in shot time. I get 15 pumps before the check valve kicks in, and everything is working smoothly without any leaks or weird sounds.

Pictures to come!

Soak On

Nice job! 5 ft. isn't that much though, you could do a multi-nozzle mod to tag on an additional 5-10ft of range without touching the pc or check valve...

I am also starting to trend towards light k-mods without a check valve freeze. 30-40 will be my future balloon amounts, and with the multi-nozzle mod, that still puts me in the low 50s for range, which is enough. I'm kinda tired of breaking and/or wearing out trigger valves, so more 80 balloon mods won't be too likely.

Thanks for the comments. I might consider doin a multie nozzle mod, but have avoided doing one in the past because I have never had good experiences with homemade nozzles. Is there a optimal nozzle size for a 21k?

I'm also considering adding a strap. I'm just glad that I was able to work internally without drying or roughing any o-rings that could cause leakage later on.

Soak On

Great job on the k-mod...it's a good feeling to get more power without having to sacrifice anything else!

Did you use regular, or helium balloons? I'm quite interested in figuring out whether helium balloons are more efficient for k-modding, as I only used 25 balloons yet got a 40% increase in output from the same nozzle. Does that mean that pressure also increased by 40%?

I'm also thinking about doing more light k-mods to my guns, next up is one of my 1500's. I'll probably only use 15-20 of these helium balloons, and then denozzle it as well.

Yes I used helium quality balloons. However I have never used anything else (I didn't even know they made any other type). Good luck on your k-mod! I believe a lighter k-mod is going to become the standard in the years to come.

I think the lighter K-mod was the standard until some people felt the need to push the limit two years ago. :P

And it was fun, until the trigger valves started having problems. They simply weren't meant to take 70-90 balloons over a long period of time. So heavy k-mods and 60ft shooting modded guns will fade away, but then again, we know how to make up for much of the lost range. 55ft is still easily possible without needing a check valve freeze, if you use the right amount of balloons, gun, nozzle, and some other things.

I know I promised pictures, but the digital camera I'm using needs new batteries. In addition, all of my money right now is going towards my next karate promotion test, so I literally don't have any money to buy spray paint with. When I do, I'll finish the camo pattern and post a pic. I'm going to be aiming for a three tone sem-sharp angle camo pattern using strips of masking tape stretced vertically over the gun and spraying through the slits. it should turn out pretty nice, although Krylon Fusion isn't as long lasting as it is made out to be.

Soak On