RAW Rapid Deciding between a DonnyFL Koi and Sumo on my .25 RAW

[Raydee38]

I know the Sumo might be a little quieter, but the size and weight is also a little more than the Koi. With the thin, floating barrel on the RAW rifle I am thinking the thinner but slightly longer Koi might look a little more uniform but still do a good job. The RAW rifle I bought did not come with a moderator and I need to quiet it down some for sure.

Does anyone own both on a RAW and have any opinions?

 

[Ranchibi]

At my next RAW service thru Martin, I will have him put on a unf 1/2 20 adapter. I have used a Sumo and a Tatsu on a JSAR Raptor .22, it seemed both did a good job. Friend has a KOI on his .22 RAW and it is just a smidge louder to me not too noticeable. I have an older RAW with an OEM conventional moderator that does a good job but I think it could definitely be hushed more.

 

[Raydee38]

Thanks for the feedback, I figured the Tatsu and the Koi would be close. I am just not sure the fatter, 1.6" diameter Tatsu or Sumo will look right hanging off the end of the RAW.

 

[shambozzie]

Another option. Az full shroud.

 

[CharlieF]

Good luck buying new. Hope you can find one used. Looks like Donny quit selling LDCs

AIRGUN MODERATORS

All the quiet, all the power! Find your perfect match – there’s a moderator to compliment every size and budget. These great-looking moderators have been precision CNC'd by a professional machinist and sand-blasted and anodized for maximum durability. These moderators are intended for Airgun...

donnyfl.com

 

[Raydee38]

Good luck buying new. Hope you can find one used. Looks like Donny quit selling LDCs

AIRGUN MODERATORS

All the quiet, all the power! Find your perfect match – there’s a moderator to compliment every size and budget. These great-looking moderators have been precision CNC'd by a professional machinist and sand-blasted and anodized for maximum durability. These moderators are intended for Airgun...

donnyfl.com

I saw that last week and thought it was weird. Still plenty of sites that have them in stock.

 

[Cloud9AG]

I know the Sumo might be a little quieter, but the size and weight is also a little more than the Koi. With the thin, floating barrel on the RAW rifle I am thinking the thinner but slightly longer Koi might look a little more uniform but still do a good job. The RAW rifle I bought did not come with a moderator and I need to quiet it down some for sure.

Does anyone own both on a RAW and have any opinions?

Just to correct a statement, the RAW does not have a thin floating barrel. It is a solid LW barrel with a thin carbon fiber sleeve bonded to it. It is also not a tensioned barrel.
I did a lot of testing with moderators a couple of years ago (all of the DonnyFL, 0db, Huggett, and Impulse Air that were available), with varying results on accuracy. Most were pretty quiet on my .22 and .25 cal RAW’s, and they would cause some POI shift, but I found that the Impulse Air moderator with its stackable sections and cone-shaped inner design actually let me tune my group size by adding or removing sections. No other moderator let me do that. And it’s quiet too!

 

[Airgunmann]

In my opinion length does better and a short fat moderater

 

[Airgunmann]

I try to keep my barrels to 24 inches plus the mod . I wish it were the other way around otherwise it's a broomstick lol

 

[Florida_Man]

I briefly used a Koi on a 25 cal Cricket. I didn’t get the tightest groups with it, the Sumo was far better. In fact, the Sumo performs great on every rifle I have ever put it on. I landed on a Tatsu for my Cricket, because it grouped well and provided plenty of sound reduction with the factory shroud. I have a lower power 25 cal now and use the Tatsu on that. My sumo pretty much stays on my PP700SA when it has a 22 cal barrel in it.

 

[Cloud9AG]

I find that it depends on the rifle, caliber, and fpe. Some rifles perform best with no moderator at all, so there is no one solution; that is why I tried so many different moderators.

 

[Pelletpimp]

Try the Weihrauch XL, you will be pleasantly surprised

 

[Justaguy]

I just put a Tatsu on my .25 DRS. It makes a significant difference.

 

[Spartan]

Good luck buying new. Hope you can find one used. Looks like Donny quit selling LDCs

AIRGUN MODERATORS

All the quiet, all the power! Find your perfect match – there’s a moderator to compliment every size and budget. These great-looking moderators have been precision CNC'd by a professional machinist and sand-blasted and anodized for maximum durability. These moderators are intended for Airgun...

donnyfl.com

He is still making them, just not selling them on his site anymore. They are still widely available through the normal vendors.

 

[Raydee38]

I briefly used a Koi on a 25 cal Cricket. I didn’t get the tightest groups with it, the Sumo was far better. In fact, the Sumo performs great on every rifle I have ever put it on. I landed on a Tatsu for my Cricket, because it grouped well and provided plenty of sound reduction with the factory shroud. I have a lower power 25 cal now and use the Tatsu on that. My sumo pretty much stays on my PP700SA when it has a 22 cal barrel in it.

I ended up going with the Koi, I hope I don’t have the same experience as you did with it. I miss being able to buy them on this site but I understand the decision.

 

[dreamweaver]

I'll be interested to hear how the Koi works for you. I tried a 0db and the Sumo on my raw .22. The Sumo was better, but it's also substantially larger. The 0db is the smaller version that came with my Daystate Huntsman. Both provided a much needed reduction in sound.

 

[elh0102]

I tried a Koi once and thought it was less effective than the Sumo so I exchanged it. My RAW is an older one with Martin's original in-house moderator (not the car muffler), and I believe it might be as good as the Sumo, although I had no way to compare them on the RAW barrel.

 

[Dog]

Tried Koi on Gauntlet .25. LOUD! ..but liked the size. Enjoy that RAW!

 

[Cloud9AG]

I know the Sumo might be a little quieter, but the size and weight is also a little more than the Koi. With the thin, floating barrel on the RAW rifle I am thinking the thinner but slightly longer Koi might look a little more uniform but still do a good job. The RAW rifle I bought did not come with a moderator and I need to quiet it down some for sure.

Does anyone own both on a RAW and have any opinions?

As I mentioned in my earlier post, I tried both of those on my RAWs and didn't like them as well as the Impulse Air.

 

[Raydee38]

I tried out the Koi today on my RAW 25cal and it def made a difference. It may not be backyard quiet, but it tamed it down nicely. According to my DB app on my phone there was a 6db reduction with the Koi. I noticed a slight POI shift but it did not change my group sizes, so I am happy.