Air Lock Industries Suppressor

[cuerro viejo]

Yes, there are a myriad of variables that impact freebore boost. In general the shorter the barrel, the longer the tube, and larger the aperture size will net higher velocity gain.

For example, the largest freebore boost I have experienced was on a 12.5” 6.8 SPC2 with maxed out handloads. Suppressor was built using a 1.625” OD/1.5” ID x 7” tube, 2” blast chamber, seven 50 degree high shoulder cones progressively stacked, .375” aperture diameter, single scoop clipped.

That makes more sense, all my barrels are 18-24”

 

[4th_point]

I heard that and was honestly surprised to hear him say that. I think he/US do not understand the physics and are learning through pure brute force due to being able to print so many prototypes. Which isn’t necessarily a bad thing and can net out to the same result as someone who does, but I still found that odd. Tightening the bore creates more back pressure in the system which in turn will make the reflex more efficient.

When I was designing and building cans, I spent years studying theory, patents, cross-sections and every available public resource… in the 2018-2020 timeframe there were some oustanding resources in the form of forums that no longer exist that were a wealth of information. RIP Dr. Dater.

I would guess without seeing the cross-section of the Airlock, it is a coaxial design which is why it is so efficient for size. It’s form factor and performance is very similar to the Delta P Brevis, which was one of the pioneers in 3D printed suppressors and achieved its performance using a coaxial baffle system.

I think that you hit the nail on the head with Unknown Suppressors - brute force by prototyping.

It's one way to skin a cat, but maybe not the most efficient. And US had to backtrack statements against smaller aperture size helping suppression? That's not confidence inspiring to hear, with US being so adamant against it prior. And the fact that some people may have placed orders, based on that overconfidence?

That stated, US said that they were trying to get the OG out ASAP, and that it wouldn't be for everyone. Something like, "We made it for ourselves"?

In one of the threads (OG testing or UM/S2H/Suppressors/Scope), I asked US if analysis tools like CFD (Computational Fluid Dynamics) or FEA (Finite Element Analysis) were used. IIRC, the response was, "No". They were going to use "destructive testing" instead, but that didn't really answer the question in terms of what is gained from analysis.

And I don't recall any destructive test results being reported. Only what I would call an overload test (depending on design spec) using a 33XC?

Destructive testing implies that the sample was taken to failure, to determine its limits. Not sure if there were typos, or lack of understanding regarding standard test terminology. Also not confidence inspiring, but maybe I missed the actual destruction part somewhere?

I'm not a suppressor expert, but have experience in sound mitigation using silencers as a Noise Engineer, and tools like CFD can prove beneficial for product dev.

Simple example of CFD for those interested, below. Note, I don't know the creator nor endorsing him or the validity of the sim. Just showing what CFD looks like for those that haven't seen it.

 

[Formidilosus]

I think that you hit the nail on the head with Unknown Suppressors - brute force by prototyping.

Sort of, for a reason.

It's one way to skin a cat, but maybe not the most efficient. And US had to backtrack statements against smaller aperture size helping suppression? That's not confidence inspiring to hear, with US being so adamant against it prior. And the fact that some people may have placed orders, based on that overconfidence?

No. I will answer this because I was there when it happened.

What has been shown by lots of companies and is known by more, is that muzzle forward cans historically have not shown enough dB reduction from 6.5 bore to 30cal to make it worth it. That’s still true for most designs. However, OTB for some reason does show a relatively large difference. This was confirmed by a couple other large suppressor companies- one which sells OTB and one that doesn’t. Both stated that they aren 100% sure why, and that their muzzle forward cans don’t show it.

In one of the threads (OG testing or UM/S2H/Suppressors/Scope), I asked US if analysis tools like CFD (Computational Fluid Dynamics) or FEA (Finite Element Analysis) were used. IIRC, the response was, "No". They were going to use "destructive testing" instead, but that didn't really answer the question in terms of what is gained from analysis.

Because it has shown to not match reality often enough that it’s not really worth it. Very often designs that should be “the best” are terrible in real life when built and tested, and designs which should be “terrible” are quite good when actually measured.

One of the best cans from a dB and sound standpoint was made in a garage nearly 40 years ago, and the computer analysis that I’ve seen on it says it should be a POS. Another- one of the best suppressor companies on the market came up with their design on a napkin at a bar- again, the fluid analysis said it shouldn’t be good.

And I don't recall any destructive test results being reported. Only what I would call an overload test (depending on design spec) using a 33XC?

Destructive testing implies that the sample was taken to failure, to determine its limits. Not sure if there were typos, or lack of understanding regarding standard test terminology. Also not confidence inspiring, but maybe I missed the actual destruction part somewhere?

They have done destructive testing- I thought the videos were posted, and just got off the phone with Cliff- he thought they were. The person that ran the media/web apparently did not. They will be posted.

 

[Schroedernd]

Just ordered one. I was going to buy the OG, but the zero gravity size looks perfect for my little 6mm arc howa I built.

 

[Q_Sertorius]

Just ordered one. I was going to buy the OG, but the zero gravity size looks perfect for my little 6mm arc howa I built.

Did you get the 6mm or 6.5mm one?


____________________
“Keep on keepin’ on…”

 

[Schroedernd]

Airlock only has a 6.5 and rimfire can on their website. I don't see a 6mm can.

 

[Q_Sertorius]

Airlock only has a 6.5 and rimfire can on their website. I don't see a 6mm can.

It’s “coming soon.”


____________________
“Keep on keepin’ on…”

 

[IDVortex]

Did you get the 6mm or 6.5mm one?


____________________
“Keep on keepin’ on…”

6mm won't be out until next year.

 

[5811]

Where are people ordering these? Website shows OOS?

 

[Q_Sertorius]

Where are people ordering these? Website shows OOS?

The search indexing is broken. The direct link higher up works.


____________________
“Keep on keepin’ on…”

 

[DannyB]

We will be launching a pre-order for the restock later this week. Website is currently out of stock. Estimated ship dates will be October 1st. Gives us time to collect FFL/SOT information so that way when they are ready to ship we can file Form 3s (dealer to dealer transfer) and ship them quickly. Most out first orders shipped within 48 hours of orders being placed.

 

[Lawnboi]

We will be launching a pre-order for the restock later this week. Website is currently out of stock. Estimated ship dates will be October 1st. Gives us time to collect FFL/SOT information so that way when they are ready to ship we can file Form 3s (dealer to dealer transfer) and ship them quickly. Most out first orders shipped within 48 hours of orders being placed.

Will they be going to silencershop?

 

[DannyB]

Will they be going to silencershop?

Maybe eventually, but right now demand is so high that we’re only offering sales directly through our website. The process works like this:

1. You place the order on our website and provide payment along with the contact information and shipping address of your chosen FFL (this will be the shipping address).
2. We reach out to your dealer, get a copy of their FFL and SOT, and then file an ATF Form 3 to transfer the suppressor from our inventory to them.
3. Once it arrives at your local dealer, you’ll go in and complete the ATF paperwork with them to finalize the transfer.

 

[khuber84]

Maybe eventually, but right now demand is so high that we’re only offering sales directly through our website. The process works like this:

1. You place the order on our website and provide payment along with the contact information and shipping address of your chosen FFL (this will be the shipping address).
2. We reach out to your dealer, get a copy of their FFL and SOT, and then file an ATF Form 3 to transfer the suppressor from our inventory to them.
3. Once it arrives at your local dealer, you’ll go in and complete the ATF paperwork with them to finalize the transfer.

I haven't been home to start my form4, but the 6.5ZG is sitting at my FFLs shop. He was quite shocked by the size/weight/performance, as I told him to go ahead and try it out. I'll def be getting your 6mm variant once it's available.

 

[Presswood_936]

Will they be going to silencershop?

Just a heads up , you can still do paperwork through the silencershop system . Your dealer just needs to add it to his online inventory once he receives it

 

[omicron1792]

Just a heads up , you can still do paperwork through the silencershop system . Your dealer just needs to add it to his online inventory once he receives it

Yep. My dealer is a silence shop kiosk. So once my ffl gets it I order just like the regular silencer shop order.

 

[Lawnboi]

Just a heads up , you can still do paperwork through the silencershop system . Your dealer just needs to add it to his online inventory once he receives it

That is what they do, but they also tack on a $170 fee

 

[Presswood_936]

That is what they do, but they also tack on a $170 fee

Wow , You need a new dealer if yours is charging that much

 

[wind gypsy]

Is there a list of SOTs online anywhere like the list of FFLs on gunbroker?

As much as I'd like to just wait until stuff i want is at capitol armory, silencer shop, or a local brick and mortar, It's probably a good idea to find a local SOT as well.

 

[Presswood_936]

Is there a list of SOTs online anywhere like the list of FFLs on gunbroker?

As much as I'd like to just wait until stuff i want is at capitol armory, silencer shop, or a local brick and mortar, It's probably a good idea to find a local SOT as well.

Silencershop has an ffl finder