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Link Posted: 6/27/2017 12:45:50 PM EDT
[#1]
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Quoted:


Blanks won't cycle without a BFA and that data would be useless because the bolt carrier isn't cycling low pressure blanks.
A better test would be to stick the barrel through an insulated wall...
View Quote
Obviously you'd need a blank adapter for firing blanks. Being a technical forum, I found it moot to list this item.
Low-pressure was a reference to the level needed to lock the bolt back being at it's absolute minimum.
All of this is completely doable.

Firing through an insulated wall, while a decent suggestion, would result in wave reflection and possibly skewing the results.
Link Posted: 6/27/2017 1:39:04 PM EDT
[#2]
Why would you gather data on something that nobody has any desire to do?

The simple test is to fire it on a bolt action with the same length barrel and compare the muzzle numbers and ear numbers. These are relevant.

If you want the noise level of the action cycling, measuring the dB of releasing the BCG and chambering a round would be close enough for government work.
Link Posted: 6/27/2017 2:42:11 PM EDT
[#3]
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Quoted:
Why would you gather data on something that nobody has any desire to do?
You're already all setup, for testing, so how much more effort would it be to get the data? Very minimal!

The simple test is to fire it on a bolt action with the same length barrel and compare the muzzle numbers and ear numbers. These are relevant.
Yes, exactly why I suggested this in my previous post.

If you want the noise level of the action cycling, measuring the dB of releasing the BCG and chambering a round would be close enough for government work.
You know, for a fact, that a bolt unlocking, extracting a round, and a carrier moving rearward is quieter than one moving forward and locking a round into the chamber? How about factoring in the escaping gas used to extract the round and run the bolt back into battery? I think this is all pertinent information, especially when such dubious claims are in question.
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No better way to shut the haters up prove your claims and your products capabilities.
Link Posted: 6/27/2017 2:42:13 PM EDT
[#4]
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Quoted:

Obviously you'd need a blank adapter for firing blanks. Being a technical forum, I found it moot to list this item.
Low-pressure was a reference to the level needed to lock the bolt back being at it's absolute minimum.
All of this is completely doable.

Firing through an insulated wall, while a decent suggestion, would result in wave reflection and possibly skewing the results.
View Quote
So the directional blast of the BFA, and the comparatively low gas pressure escaping the bolt carrier vent ports and the chamber, along with the slower carrier velocity wouldn't skew the results?

ETA: I've had my experience with "cheating" sound meters, I've built a few tuned headers to squeak by sound check at 110DB at 11K RPM and still be very obviously more open on track and on the dyno than any other NA team...



Link Posted: 6/27/2017 2:49:35 PM EDT
[#5]
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Quoted:


So the directional blast of the BFA, and the comparatively low gas pressure escaping the bolt carrier vent ports and the chamber, along with the slower carrier velocity wouldn't skew the results?
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Signature from the BFA? Please, explain what you mean.
The whole point is to see the lowest metering of a BC during operation. So, no, the low pressure round wouldn't skew the test. If this meters around 120db "at the ear" (speculative for example purposes) and the Mfr claims a total signature of 118db, than there is very good reason to be suspicious. However, if the Mfr's silencer can get to near this number, you know their product is achieving near absolute attainable suppression levels. Reasonable deduction.


ETA:
That Kart is pretty sweet
Link Posted: 6/27/2017 2:59:02 PM EDT
[#6]
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Quoted:

Signature from the BFA? Please, explain what you mean.
The whole point is to see the lowest metering of a BC during operation. So, no, the low pressure round wouldn't skew the test. If this meters around 120db "at the ear" (speculative for example purposes) and the Mfr claims a total signature of 118db, than there is very good reason to be suspicious. However, if the Mfr's silencer can get to near this number, you know their product is achieving near absolute attainable suppression levels. Reasonable deduction.
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Even so, it's almost irrelevant unless you step into subsonics, as the crack is louder to bystanders than the cycling of the action.
Link Posted: 6/27/2017 3:02:48 PM EDT
[#7]
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Quoted:
ETA:
That Kart is pretty sweet
View Quote
600cc, ~82HP (through that tiny restrictor) 1.5G in the skidpad is pretty fun

We built a new one from scratch every year, Formula SAE.  I've got the 06 rolling chassis in my shop waiting on some time and money to fix it back up and put it on the road with an unrestricted GSXR motor...
Link Posted: 6/27/2017 3:54:12 PM EDT
[#8]
Since people seem to be doubting the meter numbers, how about running a back-to-back test with another well known commercially available suppressor during the same session to see what numbers you get and how it compares with the SAS?
Link Posted: 6/27/2017 6:22:20 PM EDT
[#9]
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Quoted:
Since people seem to be doubting the meter numbers, how about running a back-to-back test with another well known commercially available suppressor during the same session to see what numbers you get and how it compares with the SAS?
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This is a very good idea and likely the only way to prove anything.

Im sorry but when claims of this level are being made it turns me off from spending $1100 on suppressor + stamp due to me doubting their marketing.
Link Posted: 6/27/2017 7:04:08 PM EDT
[#10]
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Quoted:


Even so, it's almost irrelevant unless you step into subsonics, as the crack is louder to bystanders than the cycling of the action.
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I think my point is being overlooked.
All the time, I hear ppl claim their AR is so quiet that all you can hear is the action.
Well, how loud is the action?
If this test can quantify the carrier noise, we will have a baseline for these claims.
We'll also know if ~119db at the right ear is a plausible feat.

Running a can that has been 3rd party tested, and verified, is a good suggestion. It puts some faith in the metering equipment's accuracy.
Link Posted: 6/27/2017 7:22:36 PM EDT
[#11]
Link Posted: 6/27/2017 7:49:32 PM EDT
[#12]
Weren't you the one saying that the SAS Reaper MX was 10 Db quieter than the TBAC Ultra 7?
Link Posted: 6/27/2017 8:12:46 PM EDT
[#13]
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Quoted:


The Numbers are hard to believe. I know hey seem really low.  They are accurate. Test 3 separate times with the same results.  Tim and i are working out the details for MAC for them the test it.
HOWEVER one of use would have to be there to ensure the efficacy of the test, and ensure it is done to standard, with proper a meter.

This is the Quietest Can i have ever shot. We are working out getting other truly independent testing.  It is not easy to find some one that doesn't have a agenda or getting some thing from some for the results they want.


If i have said this once i have said it 10 times.
Tim at SAS will allow any one to come out and test the suppressors. Meter them as well. This will show that testing procedures are 100% on the up and up.
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Please don't take this the wrong way, but if the meter or some component of the meter is broken or out of cal, one test, five tests or a hundred tests would produce the same results. I am not implying that your meter is faulty but a quick sanity check would be to take measurements on something that is known as opposed to obtaining a whole new instrumentation setup.

Most of us would jump at the chance to do some metering with SAS, but distance precludes most of us from participating in that activity.
Link Posted: 6/27/2017 8:38:58 PM EDT
[#14]
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Quoted:

I think my point is being overlooked.
All the time, I hear ppl claim their AR is so quiet that all you can hear is the action.
Well, how loud is the action?
If this test can quantify the carrier noise, we will have a baseline for these claims.
We'll also know if ~119db at the right ear is a plausible feat.
View Quote
Maybe I'm missing something here... are you implying that a manual cycling of the action, as fast as possible, is not a good enough simulation of the bolt cycling?  Or how about just locking the bolt back, inserting a loaded mag, and then hitting the bolt release?
Link Posted: 6/27/2017 8:56:56 PM EDT
[#15]
Slap a competitor's (or 2-3) on with the exact same mic setup & then yours and leave the camera going.  Watch the orders roll in!

I'm pullin' for ya!  
Link Posted: 6/27/2017 8:57:44 PM EDT
[#16]
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Quoted:

I think my point is being overlooked.
All the time, I hear ppl claim their AR is so quiet that all you can hear is the action.
Well, how loud is the action?
View Quote
This has been known for decades. Just ask someone who has been doing testing Titsworth, Dater, Paulson, etc.

Here is some work JT did for reference

http://www.silencerresearch.com/decibel_reference_library.htm
Link Posted: 6/27/2017 9:18:39 PM EDT
[#17]
Link Posted: 6/27/2017 9:45:03 PM EDT
[#18]
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Quoted:
Maybe I'm missing something here... are you implying that a manual cycling of the action, as fast as possible, is not a good enough simulation of the bolt cycling?  Or how about just locking the bolt back, inserting a loaded mag, and then hitting the bolt release?
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Quoted:
Maybe I'm missing something here... are you implying that a manual cycling of the action, as fast as possible, is not a good enough simulation of the bolt cycling?  Or how about just locking the bolt back, inserting a loaded mag, and then hitting the bolt release?
Not to be crass, but are you implying that manually cycling the action is the same as the sudden expansion of gunpowder?
Might I compare the firing of a bullet to simply throwing one downrange?

I wouldn't assume them to be at 2 ends of the spectrum, but I'm sorry for not being presumptive.
After-all, we're discussing the measurement of gases rapidly expanding, from the muzzle of a firearm, and consequently causing a measurable sound pressure wave.
How does this differ from the gases used to unlock the bolt and propel the carrier rearward? Would this not have an added, measurable, impact to the results? I would think so.

Quoted:
This has been known for decades. Just ask someone who has been doing testing Titsworth, Dater, Paulson, etc.
Here is some work JT did for reference
http://www.silencerresearch.com/decibel_reference_library.htm
Thank you for the link, but nothing in it shows what an AR15 action, cycling from a discharged round, meters.

I'm sorry for going a bit astray, but I don't see what everyone's hangup with gathering viable data is. I would very much enjoy spending a day with some new friends, all whilst shooting guns and running some suppressor tests. Alas, real life and about 2 thousand miles are in the way. Regardless. If the action noise comes out to be at or less than 120db and SAS's numbers are authentic, than we're all in for a win. Pushing the reduction numbers is what this game is all about. Especially to the point where the mechanic report is greater than the chemical. I, for one, love designing and building my Form 1's. To know that the feat being discussed can be attained is quite significant to me.
Link Posted: 6/27/2017 10:23:57 PM EDT
[#19]
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Quoted:
Not to be crass, but are you implying that manually cycling the action is the same as the sudden expansion of gunpowder?
Might I compare the firing of a bullet to simply throwing one downrange?

I wouldn't assume them to be at 2 ends of the spectrum, but I'm sorry for not being presumptive.
After-all, we're discussing the measurement of gases rapidly expanding, from the muzzle of a firearm, and consequently causing a measurable sound pressure wave.
How does this differ from the gases used to unlock the bolt and propel the carrier rearward? Would this not have an added, measurable, impact to the results? I would think so.

Thank you for the link, but nothing in it shows what an AR15 action, cycling from a discharged round, meters.

I'm sorry for going a bit astray, but I don't see what everyone's hangup with gathering viable data is.
I would very much enjoy spending a day with some new friends, all whilst shooting guns and running some suppressor tests. Alas, real life and about 2 thousand miles are in the way. Regardless. If the action noise comes out to be at or less than 120db and SAS's numbers are authentic, than we're all in for a win. Pushing the reduction numbers is what this game is all about. Especially to the point where the mechanic report is greater than the chemical. I, for one, love designing and building my Form 1's. To know that the feat being discussed can be attained is quite significant to me.
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Quoted:
Quoted:
Maybe I'm missing something here... are you implying that a manual cycling of the action, as fast as possible, is not a good enough simulation of the bolt cycling?  Or how about just locking the bolt back, inserting a loaded mag, and then hitting the bolt release?
Not to be crass, but are you implying that manually cycling the action is the same as the sudden expansion of gunpowder?
Might I compare the firing of a bullet to simply throwing one downrange?

I wouldn't assume them to be at 2 ends of the spectrum, but I'm sorry for not being presumptive.
After-all, we're discussing the measurement of gases rapidly expanding, from the muzzle of a firearm, and consequently causing a measurable sound pressure wave.
How does this differ from the gases used to unlock the bolt and propel the carrier rearward? Would this not have an added, measurable, impact to the results? I would think so.

Quoted:
This has been known for decades. Just ask someone who has been doing testing Titsworth, Dater, Paulson, etc.
Here is some work JT did for reference
http://www.silencerresearch.com/decibel_reference_library.htm
Thank you for the link, but nothing in it shows what an AR15 action, cycling from a discharged round, meters.

I'm sorry for going a bit astray, but I don't see what everyone's hangup with gathering viable data is.
I would very much enjoy spending a day with some new friends, all whilst shooting guns and running some suppressor tests. Alas, real life and about 2 thousand miles are in the way. Regardless. If the action noise comes out to be at or less than 120db and SAS's numbers are authentic, than we're all in for a win. Pushing the reduction numbers is what this game is all about. Especially to the point where the mechanic report is greater than the chemical. I, for one, love designing and building my Form 1's. To know that the feat being discussed can be attained is quite significant to me.
Because you're asking for something stupid. What's the sound of one hand clapping?

Who cares? The difficultly of even testing that shows you that it's impossible for it to ever even occur. If it won't ever occur, that's probably a good hint as to why nobody tests for it.

To be clear: You want the isolated sound of an AR-15 firing, but ONLY the port noise from that, not the overall noise. Right? Nobody tests for that because they test for how their silencer performs. What you want is irrelevant.
Link Posted: 6/27/2017 10:30:53 PM EDT
[#20]
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Quoted:
If you can get someone to work-up some low-pressure blank rounds (just enough to lock a bolt carrier open), you'd be able to test absolute minimal db metering of a carrier cycling (at the shooter's ear).
I think it might be worthwhile to bring a bolt rifle, chambered in 5.56/.223, for some objective testing.
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I too want to know what the cycle noise is as the baseline minimum.
Link Posted: 6/27/2017 10:46:08 PM EDT
[#21]
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Quoted:


I too want to know what the cycle noise is as the baseline minimum.
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Is this not settled. I always heard an AR action was 118
Link Posted: 6/27/2017 10:55:26 PM EDT
[#22]
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Quoted:
Is this not settled. I always heard an AR action was 118
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Quoted:
Quoted:


I too want to know what the cycle noise is as the baseline minimum.
Is this not settled. I always heard an AR action was 118
Apparently action noise isn't useful, only the sound of the action when firing - but isolated from the actual sound of the gunshot, is a viable data point.
Link Posted: 6/27/2017 11:57:28 PM EDT
[#23]
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Quoted:


Apparently action noise isn't useful, only the sound of the action when firing - but isolated from the actual sound of the gunshot, is a viable data point.
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You have never made more sense Gp
Link Posted: 6/28/2017 12:19:02 AM EDT
[#24]
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Quoted:
Apparently action noise isn't useful, only the sound of the action when firing - but isolated from the actual sound of the gunshot, is a viable data point.
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Quoted:
Quoted:
Quoted:


I too want to know what the cycle noise is as the baseline minimum.
Is this not settled. I always heard an AR action was 118
Apparently action noise isn't useful, only the sound of the action when firing - but isolated from the actual sound of the gunshot, is a viable data point.
Shifting gears somewhat, if it's that damn loud, (cycle noise) I'll still go with my bolt action.  Not discounting or dogging this product on an AR at all, in fact, it would probably earn the praises that the long(er) folks might give but in a "different fashion."  

This guy/company is trying to bring something to the marketplace.  OUR marketplace.  So what if he goes up against the WOAFPRB DB police.  Let's say they come in 2nd or 3rd...  Are you bitchin'?    Let's say they come in 1st.  You bitchin'?  8th?  If the price point and the DB parameters/usage meet your needs?  Welcome to the party, pal.  
Link Posted: 6/28/2017 1:01:06 AM EDT
[#25]
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Quoted:

Not to be crass, but are you implying that manually cycling the action is the same as the sudden expansion of gunpowder?
Might I compare the firing of a bullet to simply throwing one downrange?
View Quote
It sounds like the real question you should be asking is whether the bolt speed is significantly different between firing a round and dropping the bolt over a loaded magazine.
Link Posted: 6/28/2017 4:15:56 AM EDT
[#26]
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Quoted:


It was 131.8 at the Bore in accordance with Mil-spec testing using a BK2209 meter.
At the shooters Right ear was 118.5
At shooters Left ear was        113.
This is a 10 shot average. NOT 5.

Tim at SAS will be releasing a Video that shows the entire test unedited.

The New MX line in 308 at the Bore has been getting 133DB's with a 22" barrel FGMM 168 gr ammo,
Tim at SAS has been building Precision suppressor for more then 15yrs. He has taken his skills and experience and passed it on to AR  suppressors.
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No matter whose suppressor is used, those levels simply are not right for the left or right ear with a suppressed 5.56 weapon.

Best regards!

Tuukka
Link Posted: 6/28/2017 6:33:11 AM EDT
[#27]
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Quoted:
No matter whose suppressor is used, those levels simply are not right for the left or right ear with a suppressed 5.56 weapon.

Best regards!

Tuukka
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Quoted:
Quoted:


It was 131.8 at the Bore in accordance with Mil-spec testing using a BK2209 meter.
At the shooters Right ear was 118.5
At shooters Left ear was        113.
This is a 10 shot average. NOT 5.

Tim at SAS will be releasing a Video that shows the entire test unedited.

The New MX line in 308 at the Bore has been getting 133DB's with a 22" barrel FGMM 168 gr ammo,
Tim at SAS has been building Precision suppressor for more then 15yrs. He has taken his skills and experience and passed it on to AR  suppressors.
No matter whose suppressor is used, those levels simply are not right for the left or right ear with a suppressed 5.56 weapon.

Best regards!

Tuukka
So what your saying is, there will never be a suppressor built ever at any time that could possibly meter that low? That's pretty bold. So far, this thing looks promising and doesn't seem to have a conventional suppressor comparison as you stated earlier.
Link Posted: 6/28/2017 7:23:30 AM EDT
[#28]
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Quoted:

Is this not settled. I always heard an AR action was 118
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Yeah I replied to a page 2 post and missed most of the 3 responses.

The point is anything close to the upper one teens is pretty remarkable. Ill stand by for more testing and verification.
Link Posted: 6/28/2017 7:24:48 AM EDT
[#29]
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Quoted:
It sounds like the real question you should be asking is whether the bolt speed is significantly different between firing a round and dropping the bolt over a loaded magazine.
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Yes. This is the real question regarding action noise.
Link Posted: 6/28/2017 7:31:37 AM EDT
[#30]
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Quoted:
Yes. This is the real question regarding action noise.
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Yes, the bolt is usually traveling faster when closing during cycling than when dropping it with the bolt release.
The bumper at the rear of the buffer rebounds off of the rear of the buffer tube and imparts forward momentum to the carrier as soon as it starts forwards.
The exception would be an over-damped hydraulic buffer or a rifle that has been leaned down so far on gas as to barely lock back and not impact the rear of the buffer tube.
Link Posted: 6/28/2017 7:53:18 AM EDT
[#31]
Link Posted: 6/28/2017 7:58:00 AM EDT
[#32]
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Quoted:
People are always wanting quieter, lighter better suppressors. When something comes along that is just that, They want to call it a fraud, or BS.
...
To date this is the quietest 556 can i have every shot.
Come try it. You will be impressed.
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They like to do that because all too often it's just that.  Were you around for the Jesse James magic potato thread? (below)
Not saying that is the case here by any means, but the best way to shut them up, short of flying everyone out there, would be a side by side test video with other popular cans.

Link Posted: 6/28/2017 8:27:01 AM EDT
[#33]
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Quoted:
If any one is in the Northeast and wants to try the Claymore First hand Contact me and we can set a date to meet as well.
I am in New London, NH.
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Steve, I haven't been up near Sunapee in forever. I used to summer in the Springfield, Ludlow, Chester VT area and we used to have a house in Claremont.

If I could make it, I'd be very interested in this. You could try and contact YHM; I know they wanted some independent testing of their Nitro suppressor.
The suggestions of a side-by-side comparison, using a popular silencer, is a great idea.

Get together w/ some of the CTHTF guys and see if you could set something up at the Hartford Gun Club, or another area range. I'm sure plenty of guys in the Hometown forums are members and might be able to help you.
Link Posted: 6/28/2017 8:36:14 AM EDT
[#34]
Rangerwalker71 are you saying that if I come to NH or Reno I can test the can and see the results for myself?  I kid I know you have said that at least 10+ times so far I don't envy you or suppressor mfg's.  

No matter what you do there will always be people who don't believe you.
Link Posted: 6/28/2017 9:26:43 AM EDT
[#35]
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https://youtu.be/xyGcaecIPaMQuoted:
Weren't you the one saying that the SAS Reaper MX was 10 Db quieter than the TBAC Ultra 7?
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Do a video in one continuous shot like this.


Thunder Beast Ultra 7 v SAS Reaper MX sound test.


https://youtu.be/xyGcaecIPaM
Link Posted: 6/28/2017 9:26:52 AM EDT
[#36]
Link Posted: 6/28/2017 9:29:24 AM EDT
[#37]
Link Posted: 6/28/2017 9:36:20 AM EDT
[#38]
Link Posted: 6/28/2017 9:37:28 AM EDT
[#39]
Link Posted: 6/28/2017 9:45:22 AM EDT
[#40]
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Quoted:


Your in VA, If you every make a trip up north, Let me know and i'll put you on one for your self.   That goes for any one!!!


tim has one and will be getting it out this week.
At the Bore, to show the 10 shot average below 132.
and at shooters Right ear at the 118-119 level.
thanks
RLTW
STEVE
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I'm very interested in a titanium "reflex" silencer for a SPR type rifle.  Can't wait for the video.

If possible please show:

Mil-spec muzzle and right ear numbers of bare muzzle, Claymore and we'll regarded competition like a m4-2000, recce 5 ECT.

I don't think I've ever seen bare muzzle numbers at right ear.

Thanks.

Edit to add.  
SWR and SilencerCo put out great videos of their silencers vs. the competitive a few years ago. Somthing like that would go a long way IMO.
Link Posted: 6/28/2017 9:47:21 AM EDT
[#41]
Link Posted: 6/28/2017 10:39:22 AM EDT
[#42]
Link Posted: 6/28/2017 10:51:03 AM EDT
[#43]
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Quoted:
I have a Larson QPR.  
Before the usual suspects come in with the "your meter doesn't meet the spec..."; I know.  
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I wouldn't worry much about the naysayers, in regard to you QPR.
Dr Phil Dater says this meter is acceptable (pg51) so they can go argue with him
Link Posted: 6/28/2017 10:57:10 AM EDT
[#44]
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What meter are you using??
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From my testing, action noise averages 116db. Sound meter 1m left of muzzle and 1.6m from the ground. My meter does read between 1-2 db low however. 
What meter are you using??
Are you closing the bolt on a loaded mag or empty chamber?

Empty chamber would be a bit louder I would think
Link Posted: 6/28/2017 12:21:59 PM EDT
[#45]
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Quoted:
Thank you for the link, but nothing in it shows what an AR15 action, cycling from a discharged round, meters.
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Hence why I gave you 3 names of people to talk to. What did they say?
Link Posted: 6/28/2017 12:29:35 PM EDT
[#46]
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Quoted:


So what your saying is, there will never be a suppressor built ever at any time that could possibly meter that low? That's pretty bold. So far, this thing looks promising and doesn't seem to have a conventional suppressor comparison as you stated earlier.
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The noise coming out of the action is unsurpressed; Even if a can has zero blowback, there is going to be a minimum db Level coming out of the action, and that cannot be changed with or without a silencer.
Link Posted: 6/28/2017 2:01:34 PM EDT
[#47]
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Quoted:
Weren't you the one saying that the SAS Reaper MX was 10 Db quieter than the TBAC Ultra 7?
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Do you have a link to where this was said? I'm curious now to see if there is a history.
Link Posted: 6/28/2017 2:47:31 PM EDT
[#48]
Link Posted: 6/28/2017 3:04:08 PM EDT
[#49]
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Quoted:
Here is the At right ear Meter test Video.
Hope this will clear up a few Questions.

LINK to youtube.
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The offer has been made a dozen times in this thread for people to fly across the country to test their can next to this one, but do you guys have a single other popular can to meter right next to this one? Then numbers can be compared between said can and an existing test?

Seeing this test by itself isn't super useful since there's no baseline.
Link Posted: 6/28/2017 3:51:27 PM EDT
[#50]
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Quoted:


The offer has been made a dozen times in this thread for people to fly across the country to test their can next to this one, but do you guys have a single other popular can to meter right next to this one? Then numbers can be compared between said can and an existing test?

Seeing this test by itself isn't super useful since there's no baseline.
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Steve sells (or used to) a broad array of suppressors form various manufacturers, so i would think he would.
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