Another Thumb Up for the A.U.O Silencer

[Rick67]

Charlie,

To repeat the obvious; a foam sleeve occupies volume.  If the tube ID is on the small side, and the foam is closed cell, then placing it inside the tube will help by "cushioning", but hurt (probably more) by reducing air expansion volume.  So, internal foam should be low density open cell, and not very thick.

Something such as this, perhaps:  https://www.mcmaster.com/8614K81/

I am using this particular foam for my 17xx shroud with a 10" LW 1701P barrel:


https://www.exercise-equipment-parts.com/mini-sponge-grips.html


It is a tight fit and you can coax it in 

The hole is approx. 9.5mm and will get smaller, as it will get compressed as you force the foam in, but no problemo with a .177 pellet or even a .22.

I am experimenting perforated pen tubes (inserted into the foam itself) to act as vents 

[brewbear]

Is there a thread that where all these wonderful things are explained in "beginner " language, please? I am a very recent convert to the "Joy of Air Shooting" and I would dearly like to understand what you folks are talking about. The clear thing is that you're discussing a silencer (or two or three) that quiets down the pop from our "toy of choice" and makes it neighbor friendly. I have two Benji's, a Prowler and a Vaporizer, both in 22 cal. I would like to tone down the pop!!! but don't even know if that's possible.

[mrbulk]

Is there a thread that where all these wonderful things are explained in "beginner " language, please? I am a very recent convert to the "Joy of Air Shooting" and I would dearly like to understand what you folks are talking about. The clear thing is that you're discussing a silencer (or two or three) that quiets down the pop from our "toy of choice" and makes it neighbor friendly. I have two Benji's, a Prowler and a Vaporizer, both in 22 cal. I would like to tone down the pop!!! but don't even know if that's possible.

Ted check this link out:

https://www.gatewaytoairguns.org/GTA/index.php?topic=182738.0

The key is you will need an adapter for your guns with a 1/2"-20 UNF male thread so these silencers can spin right on.

[brewbear]

Is there a thread that where all these wonderful things are explained in "beginner " language, please? I am a very recent convert to the "Joy of Air Shooting" and I would dearly like to understand what you folks are talking about. The clear thing is that you're discussing a silencer (or two or three) that quiets down the pop from our "toy of choice" and makes it neighbor friendly. I have two Benji's, a Prowler and a Vaporizer, both in 22 cal. I would like to tone down the pop!!! but don't even know if that's possible.

Ted check this link out:

https://www.gatewaytoairguns.org/GTA/index.php?topic=182738.0

The key is you will need an adapter for your guns with a 1/2"-20 UNF male thread so these silencers can spin right on.

Just read thru the thread, thank you. Very informative and detailed, thank you for the time you put in collecting the data. Getting the adapter is another hurdle I'll have to get over...

[subscriber]

Richard,

Looking at the ID of that foam sleeve you linked to, it seems like closed cell foam (sensible for a handle that you are going to sweat against).  The OD does look like open cell foam, or more likely foam that has been die cut.

If your foam sleeve is made from closed cell foam, it will take up a lot of expansion volume.  So, useful for overwrapping an LDC, but not for stuffing it.

How can one tell for sure if foam is open or closed cell?   An easy way is to squash it in the hand while submerged in water.  If it soaks up a lot of water when you allow the foam to re-expand, then it is open cell.  If only the outside cells take some water, then it is closed cell.


From:  https://www.exercise-equipment-parts.com/mini-sponge-grips.html

[Rick67]

Mr. Sub, the foam seems very porous.

Well, after reading what you wrote, I dunked it in  water, so it is now very wet 

The material is unlike the Tacbro foam sleeves, which is some type of high density material with a somewhat rubbery feel to it.

I tried this Atlantis foam (cut to length) on my PROD build (1720T spacer), but I did remove the baffles and spring.

It seems quieter, although I don’t have a decibel meter other than ears, lol!

When my shroud and 1720T bolt arrives from Crosman I will install a piece of it, which should be longer because my new build will sport a shorter a 1701P barrel.