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Posted: 8/19/2026 11:05:25 AM EDT
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I'm a fan of Silencer Analytics and Griffin. https://www.youtube.com/watch?v=KTscqg595bg SA had a few Griffin cans to test and I was kinda holding my breath b/c of course I wanted Griffon to do good, Griffin didn't do good, THEY DID GREAT! TLDR: Griffin HRT and HRT-k performed as well as the best (of the best) cans and had much better, deeper, tones as well. Testing at 11:00 and recap at 19:00 He had a lot of really good things to say at the 19 min mark in his recap. He's looking to test the hub model. Also they are very low backpressure. Bare muzzle was 11 on his AGB, G-cans were 9/10 if I recall, bad cans are down in the 3/4/5 range. If I recall he says anything above 7 is quite good; so apparently Griffin's 'managed Backpressure' is very well managed. Rob pays a lot of attention to tone. I have no idea if tone affects DB measurements, so with 2 cans of the same DB but one is a lower tone, are they really the same DB? Perhaps tone is the next thing to be managed because sooner or later we will reach diminishing returns on DBs, kinda like 22 cans. Some 22 cans are going backwards and people are trading size for DBs @Green0 - way to go!! I'm happy for you and all the folks that bought your cans love to hear this as well. One question - How do you think the DL5AM would have compared along side the other cans. same low tone more/less quiet, backpressure? I was leaning toward the DL5AM, but now rethinking the HRTk. in order to save a few oz and inches. Is there really that much of a difference between the 3? |
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Originally Posted By awd_xtc: Now I really can’t decide between the k and the full size Same. I was all into the DL5AM for the better suppression (I think), but most likely I'll be wearing foamies anyway so the difference might be negligible, plus if the tone is better then....? Waiting for Green) to comment on the tone and sound levels between the 3. I'm certain he has but it seems to get lost in the background. But anyways, hats off to this huge success. |
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Regarding tone (I think I have this right), you have competing dynamics. Sound waves are shorter for higher frequencies. The military likes this because they dissapate downrange faster and are harder to locate. Ron Allen had some comments about a design he did years ago that he thought didn't sound that good, but the military ate it up and bought a bunch. You might think the military cares about the soldiers hearing and they do, but primarily they care about suppression to the enemy. The other side of the coin is that lower tones are more pleasant to the human ear. There's a bunch of people that think Surefire or Knights are the best suppressors because the military uses them, but you have to think about the design case. I care what sounds best to me, not what sounds quietest 100 yards downrange to the enemy. |
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Originally Posted By BandaRides: Regarding tone (I think I have this right), you have competing dynamics. Sound waves are shorter for higher frequencies. The military likes this because they dissapate downrange faster and are harder to locate. Ron Allen had some comments about a design he did years ago that he thought didn't sound that good, but the military ate it up and bought a bunch. You might think the military cares about the soldiers hearing and they do, but primarily they care about suppression to the enemy. The other side of the coin is that lower tones are more pleasant to the human ear. There's a bunch of people that think Surefire or Knights are the best suppressors because the military uses them, but you have to think about the design case. I care what sounds best to me, not what sounds quietest 100 yards downrange to the enemy. I personally like suppressors that have a lower (bass) type tone. But treble or high frequency tones do travel less distance. To my ears when I'm shooting I don't like the snap of some suppressors even with ear pro one. The lower tones just sound more pleasant. Think about someone blaring some bass heavy music in a car down the block on a summer day. Everybody can hear it. Blast rock music that's in more of a midrange tone and you can't hear it as far as the bass heavy music. |
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Highs are more directional- easier to pinpoint, but maybe unless the person on the receiving end is inline w/ the barrel, it's not as loud? Lows carry further- but are more omni-directional, more difficult to locate, that's why sub woofer placement is not as important as mids and highs maybe a sound guy can come in and correct/help me here. |
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Originally Posted By bmarshall1: @Green0 - way to go!! I'm happy for you and all the folks that bought your cans love to hear this as well. One question - How do you think the DL5AM would have compared along side the other cans. same low tone more/less quiet, backpressure? I was leaning toward the DL5AM, but now rethinking the HRTk. in order to save a few oz and inches. Is there really that much of a difference between the 3? Thanks. I think the DL5 would have more pressure, and Rob is very sensitive to pressure as a lefty, so I didn't think it was ideal to send one to him. Doing what makes you happy is ideal. I do think the HRT5K is neat in that it is short, and with the included EZ brake it performs well for the size- in the Summit test it ran about par for the Strategic sciences can that is like 3 times the price. I like the HRT5K for its class of short can performance. One thing to remember about the summit is you don't know the bore diameters- and we make cans that won't have strikes. We also don't just engineer for sound- we have flash hiders built in and they increase sound. The cans are built durable too. The Optimus 6 is also a cool can, but it is the length of the HRT5 full size and larger diameter and heavier. |
Austin, Managing Partner - www.GriffinArmament.com
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Originally Posted By bmarshall1: Highs are more directional- easier to pinpoint, but maybe unless the person on the receiving end is inline w/ the barrel, it's not as loud? Lows carry further- but are more omni-directional, more difficult to locate, that's why sub woofer placement is not as important as mids and highs maybe a sound guy can come in and correct/help me here. When people say low tone IMO, what they really mean is that the can sounded good- not peaking sharp, and not sounding like a gunshot. I don't know if people are really musicians or like an octave filter to where they can call the HZ of the sound. The cans with low LEQ and LEAQ are going to have good tone as a broad generalization. |
Austin, Managing Partner - www.GriffinArmament.com
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Originally Posted By bmarshall1: Highs are more directional- easier to pinpoint, but maybe unless the person on the receiving end is inline w/ the barrel, it's not as loud? Lows carry further- but are more omni-directional, more difficult to locate, that's why sub woofer placement is not as important as mids and highs maybe a sound guy can come in and correct/help me here. You are right. Low frequencies require more energy and are omni-directional. Its been a while but below 150hz if I recall. The wavelength of 100hz is 11.3' so you are completely enveloped. But I dont know the frequency range of the suppressors. It may not be lower than a 1000hz. Think of 2-Stroke vs 4-stroke dirtbikes. You can hear the thump of a 4stroke much further away than a 2-stroke. But when close to both the 2-stroke sounds harsher and more painful. Well thats what I remember from my car audio phase of life. |
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Originally Posted By networkguru: You are right. Low frequencies require more energy and are omni-directional. Its been a while but below 150hz if I recall. The wavelength of 100hz is 11.3' so you are completely enveloped. But I dont know the frequency range of the suppressors. It may not be lower than a 1000hz. Think of 2-Stroke vs 4-stroke dirtbikes. You can hear the thump of a 4stroke much further away than a 2-stroke. But when close to both the 2-stroke sounds harsher and more painful. Well thats what I remember from my car audio phase of life. Frequency (lower volume, higher pitch, shorter range) vs amplitude (higher volume, lower pitch, longer range) |
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I signed up for the restock email on their website. I browsing it just now and I saw that I was able to order. So yeah, ordered the HUB HRT-5K immediately. Chose the ship to my door option via Capital Armory. As a dominant shooter I’m really looking forward to this. Strange how I never got the restock email. Guessing they go out on a delay? |
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Originally Posted By IHTFP08: I should have some feedback on the HUB HRT5k after this weekends night match Originally Posted By IHTFP08: I should have some feedback on the HUB HRT5k after this weekends night match That's great. Looking forward to it. Originally Posted By waywaup: Green0, Is there gonna be another run of the A2 Hub adapter any time soon? Can't find them in-stock anywhere. I have an original Colt factory built A2 complete rifle, don't want to butcher it with modern muzzle devices. I sent an e-mail about considering the part for production. I don't think we're super busy in CNC so it should be able to be made, but that doesn't put it in stock instantly. It will be a few months with nitride which we have to ship out freight and receive back. |
Austin, Managing Partner - www.GriffinArmament.com
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I just finished up a 5 day Patrol Rifle Instructor course using the HRT5Am on a 14.5 PSA FN upper. There was only one other suppressed rifle in the group. He had a DD with one of their suppressors but I don't know which one. Side by side comparison...the Griffin sounded better. He was cleaning every morning to get the crud out..I was squirting some more lube in mine. No malfunctions at all. Almost a full thousand rounds fired this week and the HRT was fantastic. As a left hand shooter there was no issues at all with gas to the face, even in the rapid fire stages. This was my first real training class using a suppressor and I am a convert. Thanks for the recommendation Austin. |
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Originally Posted By BandaRides: Regarding tone (I think I have this right), you have competing dynamics. Sound waves are shorter for higher frequencies. The military likes this because they dissapate downrange faster and are harder to locate. Ron Allen had some comments about a design he did years ago that he thought didn't sound that good, but the military ate it up and bought a bunch. You might think the military cares about the soldiers hearing and they do, but primarily they care about suppression to the enemy. The other side of the coin is that lower tones are more pleasant to the human ear. There's a bunch of people that think Surefire or Knights are the best suppressors because the military uses them, but you have to think about the design case. I care what sounds best to me, not what sounds quietest 100 yards downrange to the enemy. I suggested to Rob a while back that he should do a video on downrange sound performance to evaluate whether the cans that sounded better to the shooter actually performed well at the target. He said it was a good idea, and I think we will be seeing that testing in the future. |
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On YT, Shark Coast Tactical, Tac Shep Actual, and Juicey Media have all done sound at various distances. I have had guys shoot with various cans and I’ll stand about 50 to 100 yards away, but there is a berm between us, so there’s that, for all the effect it may have. I think it’s even harder to quantify sound differences at distance and is best done in person. |
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my first outing with the HRT5K was great. shot a low light/night match, 8 stages. PCSL 2-gun format. 13.9 midlength, older taper mount brake, short plan a adapter. sounded great to me (last few years or so been shooting an explorr), didn't notice any gas in the face (i'm left handed), my friends didn't notice any flash, but I was also shooting white light to test a new light (zbolt LEP is awesome btw). there was a match going on so couldn't really do a good sound comparison. overall the tradeoff of gaining 3oz over the explorr was worth it. shorter, low back pressure, sounded just as good/maybe better. I can get a side by side direct comparison next outing and get some better night performance, hopefully with some of the other griffin cans I've sold my friend group. my only wishlist would have been a taper mount version so I didn't need the adapter but its got rocksett on it so it won't come loose. |
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Originally Posted By chevrofreak: I suggested to Rob a while back that he should do a video on downrange sound performance to evaluate whether the cans that sounded better to the shooter actually performed well at the target. He said it was a good idea, and I think we will be seeing that testing in the future. Originally Posted By chevrofreak: Originally Posted By BandaRides: Regarding tone (I think I have this right), you have competing dynamics. Sound waves are shorter for higher frequencies. The military likes this because they dissapate downrange faster and are harder to locate. Ron Allen had some comments about a design he did years ago that he thought didn't sound that good, but the military ate it up and bought a bunch. You might think the military cares about the soldiers hearing and they do, but primarily they care about suppression to the enemy. The other side of the coin is that lower tones are more pleasant to the human ear. There's a bunch of people that think Surefire or Knights are the best suppressors because the military uses them, but you have to think about the design case. I care what sounds best to me, not what sounds quietest 100 yards downrange to the enemy. I suggested to Rob a while back that he should do a video on downrange sound performance to evaluate whether the cans that sounded better to the shooter actually performed well at the target. He said it was a good idea, and I think we will be seeing that testing in the future. I also put a plug in for a downrange sound test, hopefully more than a few people have and he can make it happen. |
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I've been mulling over a lot of options for a new 5.56 can, from the Rhodie 6 Ti to the Tisha, Fireteam 5.56 and a few others, but I just ordered a Griffin Armament HUB HRT-556 AM, my first Griffin, because it sure seems like one of the best bang for the buck options out there right now. I am going to run it with a SilencerCo ASR mount because all of my other 5.56 cans are also running the ASR. I really liked how it sounded in this video, even though I am not sure that will translate to real life. |
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