[SHOT 2016] OSS Suppressor Live Fire Test

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OSS has a unique suppressor design. It is not a baffle design but something along the lines of a jet turbine. There are coils that allow the gas to expand in a different method and flows out the front of the can. This design allows the gas to vent away from the muzzle and so you do not get the stereotypical increase in pressure in the bore or the gas system. Which usually results in higher rate of fire and gas blown back into the shooter’s face. In some instances the OSS suppressor has removed gas and pressure to decrease bolt velocity.

OSS collaborated with Battlefield Vegas. We were shooting in their indoor range. It is a very small range considering the weapons we were using inside.

Below are the variety of weapons available to be shot. Funny enough, none of these have a standard length 16″ barrel. They were all 14.5″ or less. Other than the Barret and Desert Tech bolt guns.

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Yes, that is a Barret MRAD in .338 Lapua. It sounded like an non-suppressed .22LR when we shot it with ears off.

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OSS even brought out their testing equipment to illustrate to people the velocity, heat, and sound tests they run.

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The OSS cans come in two flavors. Over the barrel and flush mount. With an over the barrel design, the BPR (Back Pressure Regulator) screws onto the barrel but the majority of it sits behind the muzzle. Then the SRM (Signature Reduction Module) is threaded onto the BRP. There are 5 different length BPRs and 4 different length SRMs. There are 20 different combinations you can make by changing them.

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The BRP alone will take the edge off the muzzle report and screws directly onto the threads of the barrel. There are no shims or adapters needed. The BRP is the registered component. And since it sits behind the muzzle, if there is a baffle strike or something else catastrophic happens, then it will most likely happen to the SRM at the end. The entire device, BRP and SRM, are completely serviceable.

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After testing a non-suppressed AR SBR and then the same gun suppressed by OSS, I moved onto the big guns. Full Auto M249 with their new MG suppressor, a Barret MRAD (I didnt have video of it so I used my friend), a .300blk just to see how quiet it was, and then a SCAR 17S.

I got a chance to shoot a Beretta ARX last Monday during Media Day At The Range, however you do not get to appreciate the suppression when you are out doors and shooting a normal AR style rifle. Running the gamut of large calibers and full auto provides a LOT more feedback and gave me new perspective on how amazing the OSS suppressors are.



Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick found his passion through competitive shooting while living in NY. He participates in USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.

Any questions please email him at nicholas.c@staff.thefirearmblog.com


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  • Nicks87

    Finally something interesting and innovative at shot. I wonder how light weight the design is, from the photos they look like the suppressors might be kind of heavy.

    • Reef Blastbody

      Yeah, it looks like they’re using stators to redirect the gasses and let them dissipate their heat over a longer linear distance, in addition to having a volume of air like a traditional baffle stack design. In essence making the hot gasses run through a maze and dissipate their energy that way rather than capturing them in an empty airspace.

      • MikeSmith13807

        They are redirecting the gas so it travels over a very long path (I think something like 40 feet?) instead of simply trapping it.

        • JumpIf NotZero

          No. There is no forcing gas to travel a path like that. They have a lot of volume, but a very short amount of time to direct it. That directing is what baffels are for.

          • MikeSmith13807

            I don’t know who you are and I don’t know your qualifications for speaking on the issue, so instead of arguing with you I’ll just direct you to the guys who have spent 10 years and millions of dollars developing their design–argue with their sales and design guys if you want.

            However I’ll grant you their sales and marketing dept has been less than impressive… but it appears they are working to improve that.

        • claymore

          You mean like the original spiral baffles from Military armaments way back in the 60’s and 70’s LOL

    • Nicholas Chen

      They are a bit heavier. But nothing terrible.

    • BillC

      This isn’t Year 1 or Day 1 news. OSS has been around for at least a couple years now or something, but good luck ever finding one in the wild.

      • Mike Troxell

        They didn’t sell very well. Hence why they were hard to find. Dealers won’t buy what doesn’t sell.

  • iksnilol

    Eh, I like the design but they are still shady to me for refusing to test according to NATO standards.

    • BillC

      Sound, it’s all subjective until numbers, gathered in exactly the same methods and standards, are available. Cellphone videos don’t prove anything sounds-wise, Hell, even ears don’t prove anything. My Omega doesn’t sound any different from my friend’s SDN-6. OSS’s only claim to fame right now is the reduced backpressure.

      • iksnilol

        Yup.

  • Hensley Beuron Garlington

    Sweet! Working with the guys at Battlefield Vegas should be more than enough testing and feedback.

  • Sianmink

    It’s odd because the sound reduction specs on their website aren’t impressive at all.

    • Nicholas Chen

      Sound reduction is misleading. Kinda like lumens on flashlights. Pure raw numbers dont mean much. Tone and pressure are some considerations among other criteria.

      • JumpIf NotZero

        Pressure is sound. “Tone” is subjective.

        Lumens are objective, the issue is LUX is really more important but harder to specify as is a value at a location.

        OSS hasn’t shown anyone their suppressors are quiet – you know what has less back pressure than OSS Supressors? No supressor. So if the two are similar in sound… But also a properly gassed suppressed gun will have identical cyclic rate to unsuppressed and any OSS.

        The real value with the OSS is you can drop the “can” portion and not have to mess with gas settings. This is of little value to people who just shoot suppressed always (myself).

        • John Daniels

          Tone can be measured, too. It’s not subjective. I don’t know that anybody tests for that, but that doesn’t make it subjective.

      • Jason

        I have shot yhm, silencerco saker, saker k, and aac right next to each other and compared them to a bpr26 from oss. The oss can blew them out if the water. Look at the industry, there isn’t a standard in how to measure db ratings. These guys are measuring them in steel 10×10 box at the shooters right and left ear. Their db reduction postings in their cans are misleading. Go anywhere else and it can vary from outside 1 meter from the left to concrete building at the muzzle….someone needs to get all the options out there and create an actual controlled environment so wet can get an apples to apples comparison.

    • Dbom

      For what it is worth I had an opportunity to shoot three top brands of suppressors this weekend.

      OSS was one of them. I won’t bother mentioning the other two but everyone here would recognize them as battle tested and proven.

      The point is, to my Untrained Ears, the OSS suppressor (with 5.56) was easily the quietest of the three.

      And I put my money where my mouth is an ordered one.

      The claims about low felt recoil and limited gas (ie no more that you might get shooting unsuppressed) in your face were all true as well.

      Like someone else says below- if you don’t believe it, set up a demo and try them out yourself.

  • MikeSmith13807

    The OSS products are hard to understand at first glance and there are a lot of misconceptions floating around the Internet. You should try to arrange a one one one session with them to get the full story and explanation of how everything works. You should also try to do some side by side comparisons with leading conventional designs. They are truly the most revolutionary thing happening in the world of suppressors.

    • CommonSense23

      Calling them the most revolutionary things to happen in the world of suppressors is a bit of a stretch.

      • MikeSmith13807

        Your comment makes me wonder how much you know about the topic. I’ve been following them for a few years and I’m quite confident in my statement. Ask yourself this… H&K could have partnered with anybody–I’m quite sure AAC, Surefire, Gemtech, and many other companies would have groveled for the chance to become an OEM partner with H&K. Yet they chose a new company nobody had ever heard of before… as are many other premium firearms manufacturers. You suppose maybe they might know something you don’t?

        • CommonSense23

          Considering I have shot them on the 416s, pretty familiar with them. One of the perks of my job is getting to meet a good bit of people from Darpa. You start realizing that the stuff that is coming to market currently isn’t really revolutionary.

          • JumpIf NotZero

            It’s clear this guy either ones one of the handful they’ve sold privately and defending the product or is shilling.

            Either way, the advantage of the OSS system is for those that shoot both suppressed and not on the same gun. That might be useful for some, but not me personally, and the “pros” I know just switch whole guns more then they do tinker with parts or even shoot unsuppressed much anymore.

            All the same to me, I wish OSS luck, but so far, the product has been out for awhile and hasn’t made really any waves outside of some co-branding efforts.

          • MikeSmith13807

            Ok, I’ll take you at face value–I’m sure there are all kinds of cool things most of us don’t know about inside DARPA and similar operations. But that doesn’t negate the fact that OSS is the only one doing anything different in the industry. Everybody else is trying to do a better version of 100 year old technology and OSS is the only one (perhaps excluding Brevis?) trying to do something completely different.

  • SpartacusKhan

    In normal suppressor operation, there is no “back pressure” increase – it’s increased dwell time. The system sees the length of the suppressor as increased barrel length, which throws off the timing. Pressure never actually increases in the bore or gas tube, it just takes longer to dissipate. The BRP shown here is interesting in that it give expansion space to the gasses without so much increase in perceived barrel length or dwell time (the distance from the gas port to the muzzle determines dwell time), so it should work better. I’d really like to see if it might have less of an influence on accuracy as a result – keeping groups tight and keeping the same point of aim. I’d accept a little more weight for more accuracy and less wear and tear on the system as a whole, for sure.

    • Nicholas Chen

      They say that they see a .5 moa shift or less.

    • MikeSmith13807

      I think we call it “back pressure” because there’s an increase in gas coming out of the chamber. Why that happens is a different question, but its presence can be measured by measuring the bolt speed. At one point the OSS design was actually slowing the bolt, so H&K asked them to address it and now they state <4% in their marketing. They have a video on their YouTube channel demonstrating the effect on bolt speed of their design vs a conventional design.

  • JumpIf NotZero

    I wish Silencershop would have released the videos they did, but they never aired them, reports were the “suppressors” were extremely loud, too loud to post. I’m curious if that’s true. I see no reason otherwise to show testing videos of finished products. Which in all honesty makes a lot of sense, there is no free lunch. They have a lot of volume but no baffels to direct it. They have excellent machining and excellent marketing, but very few sales outside of couples do-branding efforts.

    I have yet to see any independent testing. They know how to throw a party tho.

    • Nicholas Chen

      Funny you mention that. I just joined a Suppressor program with Silencershop. I will be testing suppressors this year. Look forward to the reviews. OSS does not seem the be on their site but I will inquire about it. I want to see what happens when I put their over barrel design on my CMR-30 and shoot 22 magnum.

      • MikeSmith13807

        The impression I get is that OSS didn’t offer the best dealer experience and some of the early partners got annoyed and dropped them. I have a hard time believing there was a problem with them being “loud”. People get upset because they insist on testing at the ear in an enclosed room instead of the 1 meter to the side protocol that everybody else uses so people think that’s evidence they are trying to hide something. Now they publish test results for the conventional protocol as well. Unfortunately I haven’t seen any independent testing but hopefully you can rectify that soon!

      • claymore

        And do them at industry standard of 10′ from the muzzle perpendicular to flight of bullet for location of testing equipment. And put the results in DB LOWERED not just a final number. The better maunfacturers already do that because it eliminates “confusion” between differing companies and their test results and sound reduction figures if everybody uses the same methods.

    • G0rdon_Fr33man

      I would not be surprised. What this unit does is tackle the back pressure, not sound. The back pressure on a suppressed weapon can be limited by other means, so Iยดm not sure what the selling points are if not maximum audio suppression vs weight/size. To me, it just looks like an overly complex design to tackle what is essentially a non-issue. Blatant disregard of the KISS-principle ๐Ÿ˜›

  • Meathead

    One day someone will get smart and manufacture a suppressor the same way an aircraft engine/thrust reverser dissipates the acoustics noise leaving the engine. Rolled titanium honeycomb with perforated inconel skin would be a good start. It’s not rocket science.

  • Christian Hedegaard-Schou

    I have to say, this is very refreshing to see in an industry that can be full of fakes (Hey remember Jesse James’ magic suppressor?). Here’s a company that even if you don’t like the suppressor or price, or don’t think it will perform, they are actually doing real scientific testing and comparisons and ACTUALLY showing people those numbers.

    There are too many “magic” claims in this industry, and I am SO THANKFUL that this isn’t yet another one.

    • JumpIf NotZero

      Funny, because as to “seeing the numbers”, that’s exactly what we haven’t seen.

  • JumpIf NotZero

    Oh it’s clear you obviously know someone or have a vested interest in OSS.

    • MikeSmith13807

      Nope, I just keep an eye out for anything new and improved and when I see it I follow it to see how it develops. OSS obviously either doesn’t care or doesn’t have a clue how things work on the Internet as I’ve never seen them active anywhere other than a few minimalist FaceBook posts so I’ve just appointed myself an unpaid Internet monitor trying to do a little bit to combat all the misinformation out there… ๐Ÿ™‚ And yes, I have put my money where my mouth is and ordered 2 for myself so far.

  • Daniel Gibson

    The company Operators Suppressor Systems or also known as OSS are Crooks! Literately “Buy or Beware” with these people. What ever you do. Do not send them any thing for any reason as it will likely come back damaged! A good buddy of mine sent his upper receiver to have the profile measured for OSS to develop a suppressor for his particular rifle. I think it was a Knights which has a larger diameter barrel then what OSS had developed to overlap the barrel. They sent his upper back to him with the rear receiver smashed in from hitting something metallic. And at the time advised him it wasn’t in their production schedule to develop. He even provided time stamped before and after pictures. Oliver nor Judd took any responsibility and “waited” him out. Now a days everyone is making suppressors kinda like there’s pizza shop on every corner, and from what I’ve learned about this company. My two cents tells me to look beyond OSS for the solution for suppression. Oliver was only an E2 and never graduated beyond that but in person and in his videos he’ll misrepresent himself as greater and as a green beret which he never really was.

    • MikeSmith13807

      Thanks, but I’ll take the word of reputable industry leaders over some guy throwing mud on the Internet.

    • OSS admin

      Daniel
      aka: Daniel Purdy, always a pleasure to hear from you. Glad to see you have been following OSS. Just for the record, Russ entered the army as an E-1 not an E-2. Regarding his credentials as a Green Beret, either he is, or a few thousand Special Forces brothers are supporting his “misrepresent himself”. Sounds as if anything may be possible in your world Sir, we will let reality and history speak for itself. Best Regards, OSS

  • Daniel Gibson

    The company Operators Suppressor Systems or also known as OSS are Crooks! Literately “Buy or Beware” with these people. What ever you do. Do not send them any thing for any reason as it will likely come back damaged! A good buddy of mine sent his upper receiver to have the profile measured for OSS to develop a suppressor for his particular rifle. I think it was a Knights which has a larger diameter barrel then what OSS had developed to overlap the barrel. They sent his upper back to him with the rear receiver smashed in from hitting something metallic. And at the time advised him it wasn’t in their production schedule to develop. He even provided time stamped before and after pictures. Oliver nor Judd took any responsibility and “waited” him out. Now a days everyone is making suppressors kinda like there’s pizza shop on every corner, and from what I’ve learned about this company. My two cents tells me to look beyond OSS for the solution for suppression. Oliver was only an E2 and never graduated beyond that but in person and in his videos he’ll misrepresent himself as greater and as a green beret which he never really was.

    • John Daniels

      The expression is “buyer beware”.

    • OSS admin

      aka: Daniel Purdy, always a pleasure to hear from you. Glad to see you have been following OSS. Just for the record, Russ entered the army as an E-1 not an E-2. Regarding his credentials as a Green Beret, either he is, or a few thousand Special Forces brothers are supporting his “misrepresent himself”. Sounds as if anything may be possible in your world Sir, we will let reality and history speak for itself. Best Regards, OSS

    • Mike Troxell

      Is English your second language or are you an uneducated idiot?

  • Chad

    Contact OSS and setup a shoot if you believe your baffle can is better. DB ratings- Anything 140 and below is ear safe, tone/pitch/freq is where the argument always blurs. Set up the range and get a selection of cans together. Question- properly gassed weapons….so you have to take your gun and then make changes to it so that it will function correctly when adding your baffled can…why? Why would you be ok with having to jump thru hoops to get you gun to work by adding an accessory? Shouldn’t the add ons you install help not hurt. What’s the cost in dollars and time to do that? How often do you have to rework your gun to keep it running…next your probably OK with your eotech which has never had problems.

    • Mike Troxell

      Most quality AR15s work perfectly fine with and without a can. Quality companies, typically test their weapons with and without a can to ensure they work properly before selling them to consumers.

      Home builds are another topic. So far I have not had an issue with any can on any of my AR15s.

  • devilbunny

    Now if only their marketing team and dealers sales team would allow a profit margin worth selling these cans. A dealer can buy AAC, GEMTECH, SILENCERCO, etc..and make more money selling those than stocking these ridiculously expensive cans that in the case you do have a customer buy one, you don’t make anything off of it…Also I don’t know if the same guys are running OSS, but the guys I talked to were total a-hole know it alls who pushed this can hard, don’t believe the hype, Ive shot one side by side a Specwar, AAC 762SDN6, 762SD, and the Gemtech, for the price and the sound I heard coming from the OSS, the mentioned above are better options, in my opinion.

  • Michael Flinn

    What about the stamps that civilians must putchase? The OTB versions appear to have two components that would have to be stamped …