2014 Shot Show: HK 556A1 SD, OSS suppressor and HK keymod rail

Sputin, wow I can understand you scepticism. Having shot is numerous times down there I can say you are wrong on all accounts. It looks huge but is not as big as you think as much of the unit is a back pressure module. It is what I would describe as "disruptive technology". It offers advantages in all areas over conventional suppressors. The suppressor module only extends 4 inches beyond the muzzle of the gun. How's that for big and heavy? Everyone who got behind the gun was amazed, and on the range we were shooting there were many who we're carrying issued guns with suppressors.

Rich
 
Funny how certain guys opinions can be without having shot or seen it. It's a very quiet can, due to design it is not necessary to have any gas reduction and does not increase the rate of fire on the weapon. These are just some of the numerous advantages. They have to be shot to be believed.

Rich
 
Rich LPS said:
Sputin, wow I can understand you scepticism. Having shot is numerous times down there I can say you are wrong on all accounts. It looks huge but is not as big as you think as much of the unit is a back pressure module. It is what I would describe as "disruptive technology". It offers advantages in all areas over conventional suppressors. The suppressor module only extends 4 inches beyond the muzzle of the gun. How's that for big and heavy? Everyone who got behind the gun was amazed, and on the range we were shooting there were many who we're carrying issued guns with suppressors.
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And what exactly are these "advantages". I keep hearing about all the supposed advantages without any idea as to what the advantages are. Specifics would be nice.


Funny how certain guys opinions can be without having shot or seen it. It's a very quiet can, due to design it is not necessary to have any gas reduction and does not increase the rate of fire on the weapon. These are just some of the numerous advantages. They have to be shot to be believed.
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Again with the non-specific "advantages."

I keep seeing claims that this thing is quiet yet nobody has seen one in the wild or put one on a third party sound meter. Until that happens, the claims are nothing more than claims. We in this industry have seen these kinds of unsubstantiated claims many times before so we are naturally sceptical.

That you have heard it and believe it to be quiet is 100% irrelevant. The human ear cannot discern differences in amplitude, duration and frequency and combinations thereof can easily fool the casual observer.

I have been designing and building sound suppressors for the better part of a decade. As a student of the history of these devices I have seen and been exposed to most of the commercially successful designs from the past and present. To make such claims about a new and untested design being superior to everything built over the last 100 years is supremely arrogant. Especially when that design has zero history itself.
 
I watch a youtube video where a guy was demonstrating the the OSS suppressor package and it didn't get quiet till he finally added the SRM (Signature Reduction Model) to the end. Just with the BPR (Back Pressure Regulator) the sound really didn't get reduced. It was quite amazing how the SRM actually completed the system and being only around 4" long. I understand how the SRM works together with the BPR to reduce the signature and it is quite a complicated design. I can imagine though how dirty the whole system will get over time.
 
Here is the url to the video I seen. h ttp://www.youtube.com/watch?v=fuf03PS6-C8


I watched it again and I notice that the guy doing the demonstration added a second SRM to the first one increasing the amount of suppression. I am guessing with this system you could add mulitple SRM's increasing the suppression each time.

I do wonder which part is considered the suppressor by the ATF though? It could get expensive in tax stamps if each SRM needed to be registered. HEHE
 
Suputin, I'm aware of your background.

I did not have a sound meter available during the shooting. There is no back pressure into the gun. No need to reduce or regulate the gas on the weapon. The design does not increase the rate of fire of the weapon. Range day test weapons fired several thousand rounds without cleaning. There is a slight vacuum when firing, the opposite of back pressure. The same suppressor can be used on multiple different calibres of guns. The way the gas leaves the gun and goes into the unit and is vented keeps the suppressor cooler than conventional designs. The design also prevents the unit from loosening during firing. These are just some of the unique features that the system provides. HK would never partner with another company unless the product offered was throughly tested and offered unique capabilities.

As I said before I believe this is disruptive technology and apparently the engineers at HK agree. I hope more users get a chance to try it.

Rich
 
Gunnerlove said:
According to their website the power of the hexagon is strong in this OSS product.
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Whatever. A $30 suppressor cover will do the same thing.

IMO a lot of this is solutions in search of a problem. I will admit that a low back pressure design would be nice but the penalty is a large, heavy, loud, expensive and potentially delicate can. Think I'll stick with my conventional designs thanks.

Nobody is simply going to sidestep 100 years of development and a lot of these kinds of ideas have been tried before and failed.
 
Also no first round pop with this design. Very durable as well. Every once and a while there is a leap forward in technology. From what I've seen this could be it. HK certainly thinks so.

Rich
 
You can utilize just the suppressor module. Only 6 inches past the muzzle. Not too bad.
It's tough, kind of like you've been building the best propeller aircraft imaginable and all of a sudden someone comes out with a jet engine. Hard to accept.

Rich
 
In this video the guy is obviously a representative of OSS and he claims the can does 138 dB on what looks to be a 16" rifle. From a ca. 12" long 1.75" diameter suppressor that is cr@p performance. Top 556 cans are about half the size and are metering down in the 133-132 dB range. Additionally you are paying a premium for sh!tty performance. A top of the line thread on suppressor will prob cost about half what this one does and be smaller, lighter and produce considerably better sound reduction. I've said it before and I'll say it again. You can't cheat physics.


Look closely at this vid. There is clearly a puff of gas coming out the ejection port on each shot. Their claim of no back pressure is clearly BS as well.
 
All I can say is that you will probably be impressed and very interested when you see it in "person". Let's not confuse the size of the actual suppressor, it is very small and only extends about 6 inches or less past the muzzle.

Rich
 
I am confused !
Are we talking about things that we will never touch or even see in our restricted or prohibited country !
These things are good but untouchable for all of us.
We should consider suppressing some peoples and useless laws then we will suppress sound.
Cheers.
 
Rich LPS said:
All I can say is that you will probably be impressed and very interested when you see it in "person". Let's not confuse the size of the actual suppressor, it is very small and only extends about 6 inches or less past the muzzle.

Rich
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A 6" suppressor that does 138 dB doesn't impress me at all. If it does 130 dB then I will be impressed. If it can soak up hundreds of rounds of FA without melting then I will be impressed. If it weighs 8 oz and costs $600 then I will be impressed. Until then .... not so much.
 
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