KWA M93r Velocity adjustment???

[BloodDrinker]

Any one know How to Get one of these down from 370 down to indoor legal specs with out permanent modifications to the gun?

[Gotrice23]

Originally Posted by BloodDrinker

Any one know How to Get one of these down from 370 down to indoor legal specs with out permanent modifications to the gun?

You can get an NPAS or a Dangerwerx flute valve.

[FirestormX]

Dynamo here on ASC is making and selling flute valves:
http://www.airsoftcanada.com/showthr...=147346&page=5

Towards the bottom of the thread, back in September, he said he's been too busy with work to make these, though. You can keep an eye on the thread if you're patient.

My friend has one of his valves in his KWA MP9 (was originally purchased for an M93r too), and it works great.

[Thenooblord]

or you can do it yourself, go buy some JBweld, take the rocket valve out, and its got three paddles that keep it aligned and let gas by, if you fill them in with JBweld so its got a triangular profile from the front instead of the three prongs (IE filling it in but going straight from corner to corner, not round to fit the nozzle, gotta let some gas by...), itll reduce the velocity to low 300s
protip for WE openbolts, if you plug two of the windows in the rocket valve, then drill a few/16ths" hole in each plug for a bit more flow youll get 300-350 fps depending on barrel length, and ofcourse if youre not lazy like me, you could keep tuning it till its at the exact fps you want by adding or removing material, me im not concerned with getting my guns to exactly 350 and 400 fps limits so i just leave it at the 300ish that they usually end up at
I haven't bought an NPAS in years
If I compare the loads of money i could have spent on an NPAS for every rifle ive got, or the $6 for a tube of JBweld, makes it even more attractive

Oh and its not permanent since youre just adding JBweld, if you dont want it you can just chip or file it off

[BloodDrinker]

I wonder how much a spare valve is

[ceazer]

you can always buy new mags from the states or asia they should come in the 340-350 fps range, not the cheapest option but you bypass permanent mods of the pistol

[m102404]

Brief tech explanation...skip if you know all about this:
The valve (aka rocket valve, float valve) that's used often comes in two different shapes. One is shaped like the fins of a lawn dart or one of those nerf footballs...the other is about the same size but a solid cylinder. The diameter of the cylinder or the space between the fins is what restricts or allows more gas to pass through the nozzle to push the BB down the barrel and thus affects the FPS you end up with.

TNL's description of basically filling in the fins with epoxy turns the finned version into a cylinder version. You could affect it by using shrink tube along the shank of the finned version as long as the valve fits nicely in the nozzle and doesn't hang up. Very hit and miss...but it'll have the effect of reducing the FPS.

Since one of the major differences between the US and Japanese versions of AS guns is that the Japanese version has to shoot under 300fps (forget exactly) and so they're assembled with the cylinder version of the valve. There might be other differences but they're usually minor.

So....you could order the Japanese valve part and swap it in. That should put you right around 300fps.

If you have a lathe or access to one it's not all that hard to make one (which is what Dynamo does very well). 95% of the time will be used setting things up and measuring. I think he was selling his at ~$10...and to be honest that would be a lot of a PITA for such a little bit of money. If you're scaled up to automatedly crank out hundreds of these things that's one thing...but more than one one-off would be a pain.

Also...often between models of the same manufacturer they use the same valves...so what may work in one may work in another.

[K3vX]

Or get the Dangerwerx one? Dynamo basically started doing the valves in response to Dangerwerx one being 18$ +shipping, but since he's not producing them anymore, why not just grab the other one?

http://dangerwerx.com/retailers/

[Danke]

Will it cycle on duster?

[BioRage]

Originally Posted by Danke

Will it cycle on duster?

Dusters for TM's :P

[m102404]

It will...and actually works better on that model so it doesn't destroy itself.

[BloodDrinker]

Originally Posted by Danke

Will it cycle on duster?

I have yet to try it....

[BloodDrinker]

Originally Posted by K3vX

Or get the Dangerwerx one? Dynamo basically started doing the valves in response to Dangerwerx one being 18$ +shipping, but since he's not producing them anymore, why not just grab the other one?

http://dangerwerx.com/retailers/

? how hard is it to break the gun down to get to that specific valve???

[Thenooblord]

its the same amout of work as doing the mods yorself, but in once case you replace the valve and in once case you modify it, you still ahve to take the bolt apart, get the nozzle out, and dissassemble the nozzle to get the rocket valve out