Low Back Pressure Suppressors - Opinions and Recommendations

[mig1nc]

Hey, check this out. Just posted today on SSD: http://soldiersystems.net/2020/03/02...re-suppressor/

Man, B&T really needs to license a U.S. based manufacturer to make their stuff here.

[1168]

Hey, check this out. Just posted today on SSD: http://soldiersystems.net/2020/03/02...re-suppressor/

Man, B&T really needs to license a U.S. based manufacturer to make their stuff here.

That post and the pictures makes me wonder if it looks kinda like a Brevis inside.

[themonk]

Muzzle flash isn't from unburned powder. It's from high pressure superheated flammable gas igniting when mixing suddenly with fresh oxygen. If the muzzle flash was caused by unburned powder, flash suppressors would not work.

Yes, I understand. I am referring to when you put a mini can on the end of the gun. Anything under 12.5 for you going to see flash.

[1168]

Yes, I understand. I am referring to when you put a mini can on the end of the gun. Anything under 12.5 for you going to see flash.

I’ve noticed that even with 14.5 and 16” barrels, many cans exhibit more flash than an A2 on the first round only when viewed from the side in low light. Usually unseen by the shooter, and usually invisible in good light. Ammo, of course, is a big factor.

[paco ramirez]

Better dB reduction (at the muzzle) does not always translate to higher back pressure (higher dB at the ear/more gas in the face/cyclic rate increase), but it does for most companies that make traditional silencers. Shorter barrel length does not always translate to more particle erosion, but it does for companies that make traditional silencers. That will also apply to most companies doing "flow bypass" type silencers. And it's true that in low light or darkness many silencers will show first round flash. Surefire/Ops Inc silencers have slightly less back pressure than some others because the baffles are ported to send gas to the front cap aperture faster than they otherwise would and they also don't sound great or meter well. The backpressure is still pretty bad on them which is why many left handed shooters don't use them either when they have a choice and/or the experience to know better. The Suppressed Nation videos are good because they show the muzzle and the ear numbers at the same time. They now have a BK Pulse meter which is even better and will capture every single shot at all three locations simultaneously.

Here's something I wrote up on TOS regarding this metering video: https://www.youtube.com/watch?v=3y87pu6wMYE&t=

"A person shouldn't just look at ear numbers to make decisions about what to buy, the muzzle number in combination with the ear number is what matters and only when those numbers are recorded on the same day, same host, same ammo, same proper meter, proper mic locations, etc. Take a look at the ear and muzzle numbers for the Dead Air Sandman K compared to the Dead Air Nomad.

Sandman K -
Muzzle: 148.34dB
Ear: 147.56dB

Nomad -
Muzzle: 135.78dB
Ear: 146.46dB

The ear numbers are only separated by only 1.1dB while the muzzle numbers have a variance of 12.56dB. Which one do you think is actually going to sound better in person, especially when shooting near reflective surfaces? Someone buying a Sandman K over a Nomad solely based on the ear numbers vs size is going to be really sad because in real life they aren't even close in sound, and it's only going to get worse the shorter the barrel gets."

I don't have any night videos I can show you guys, but here's our Helios QD on a 5.5" 7.62x39 firing in full auto and semi showing a lack of flash in daylight: https://www.instagram.com/p/B5HAuDagxAU/ and https://www.instagram.com/p/B5F9P1mgxUe/

And here it is on 10.5" MK18 doing a full auto mag dump showing a lack of flash in daylight: https://www.instagram.com/p/B4-2aCyAQ86/

Testing at night with our GPMG 762 silencer on an M240 it won't flash either unless it's pushed well beyond normal limits. Here it is dumping a 1000rd belt of M80 ball in one continuous string, look how long it takes for it to develop a flash near sunset: https://www.instagram.com/tv/B6bgJLZJRKD/

[Clint]

Josh,

Nearly all the cans in that video run 146-148 dB at the ear, which is often much louder than the muzzle.

Isn't the bulk of the at ear SPL just action noise, which is relatively constant except for any differences in back pressure?

[paco ramirez]

Josh,

Nearly all the cans in that video run 146-148 dB at the ear, which is often much louder than the muzzle.

Isn't the bulk of the at ear SPL just action noise, which is relatively constant except for any differences in back pressure?

Yes, they do and they're all traditional silencers, though usually shooting 5.56 through a 7.62 bore can be expected to drop the ear numbers a bit depending on the silencer. Also some silencers just aren't optimized for supersonic use, like the Trash Panda. The testing was intentionally done with a fixed gas system as a worst case scenario. The ear SPL can be remedied with an adjustable gas block when using a traditional silencer. But like someone else said earlier, PDs won't want to do that.

An AR15 bolt closing on an empty chamber is 122.9dB, closing on an empty mag is 122.8dB, and closing on a live round is 116.6dB as measured by Thunderbeast with a proper meter and correct mic location.

Suppressed Nation will be doing more testing in the future with their Pulse meter, including some "flow bypass" type silencers I'd assume. They're limited by what Hansohn Bros stocks and what they currently own themselves.

[JoshNC]

Hey, check this out. Just posted today on SSD: http://soldiersystems.net/2020/03/02...re-suppressor/

Man, B&T really needs to license a U.S. based manufacturer to make their stuff here.

B&T USA is the US manufacturer for B&T Ag (Switzerland). That’s how the consumer market is able to buy B&T pistol caliber cans. They will eventually make the rifle line here too.

[hotrodder636]

This is good news!

B&T USA is the US manufacturer for B&T Ag (Switzerland). That’s how the consumer market is able to buy B&T pistol caliber cans. They will eventually make the rifle line here too.

[mig1nc]

B&T USA is the US manufacturer for B&T Ag (Switzerland). That’s how the consumer market is able to buy B&T pistol caliber cans. They will eventually make the rifle line here too.

Hell, I didn't even know civilians could buy their pistol cans here.

That's freaking cool news!


Sent from my iPhone using Tapatalk