How to: Kriss Vector - Lower FPS with valve swap

[p.phresh]

Hey guys just created this tutorial for those who want to swap out their stock "Jet Nozzle" for a Danger Werx low power flute valve. The instructions are the same for the RA-Tech NPAS as well.

Here's the link to the blog (6mm-mag.com):
http://6mm-mag.com/2013/02/diy-insta...-kriss-vector/

Lemme know if you guys have any questions and I'll try to help.

[FirestormX]

Thanks for this!
My buddy is planning to either get a Vector and MP7, so I bought him a flute valve that Dynamo made. This will be really helpful for when he picks up either gun.

[Toonz]

Thanks for this p.phresh

[p.phresh]

glad to be of service.

[theshaneler]

yep I have installed this exact unit with great success! love using my kriss at the local CQB arena.

[Toonz]

I'm at the part where I'm about to swap the valve. I have a RA tech Npas.

1. The RA tech came with a slightly longer spring ( 3/16 longer ) and slightly less compressed in it's turns than the stock. Not sure which spring to use ?

2. I'd like to re lube the blue rubber piece. What should I use ?

[p.phresh]

use the included spring witht the NPAS. the NPAS is a bit heavier than the stock flute valve an the DangerWerx valve so you'll need the additional tension the spring provides.

use a lightweight silicon oil for the blue piston head. the same one you use in your propane adapter. you don't want to gunk up the assembly with heavy grease. overtime it will pick up dirt and get worse with a heavy grease or oil.

[Toonz]

Awsome fast response thank you.

[Toonz]

Using the RA tech Npas and green gas I was getting 286 at our local indoor place if anyone is interested. Npas was fully closed. Again thanks for the tutorial.

[p.phresh]

I have the RA-Tech NPAS installed as well, and I was getting shots around the 320 mark.

I have friends using the DangerWerx valve, and one gets shots around 315, the other around 305.

I think there may be some inconsistencies in the manufacturing that's giving such a large variation in muzzle velocities.

But glad you were able to follow the tutorial and get your valve installed.

[Toonz]

Yeah it seemed a little low but I'm happy. Indoor here is 330 fps so it will do. I had a really hard time getting the 2 little nubs out that your tutorial said might be difficult. It sucks the only place to pry is on a plastic part. Heating it up eventually worked but it took real patience. If it wasn't so hard I might try a dangerwerx one and see. On the plus side I'm really hoping parts are made available soon. If no low power bolt is officially made it's gonna be real easy to make make my own for a quick swap from outdoor to indoor.

[p.phresh]

Yeah.... making a low/power nozzle would be so easy, and the swap would be really quick... I'm keeping an eye out on KWA's website for these parts too.

[Specter_CAC]

I have been told that in order to adjust the NPAS system, the valve needs to be completely removed from the gun, then re installed, due to the super V system. is that true? or can i just drop out the super V, twist out the bolt, and have at er?

[p.phresh]

yeah if you have the NPAS adjustment tool you can just take the bolt out and stick the tool down the opening of the nozzle and adjust the NPAS.

[Toonz]

Yeah its really easy to adjust the npas after it's installed. As p.phresh said you can adjust through the end of the nozzle. This gun is simple once you take it apart and really examine it. I love it.