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Discussion Starter · #1 · (Edited)
I will edit this thread later for more detail, but for now I'm going to leave this link in-case someone else would like to give it a shot-in-the-dark like myself.

http://www.evike.com/product_info.php?products_id=38408

These sorbo pads are shaped differently from the usual PSS2 sorbo pads-- the sorbo pads in the link have a much larger hollow cavity in the center.

They come in two sizes 3/16'' and 1/8''.

1/8'' probably reduces sounds less, but does not lose as much fps as the 3/16'' and most likely deteriorates slower.

I will be reviewing the 3/16'' later this week.

___________________________________

Review

-=Ratings out of five stars=-

Tests were done with an expected FPS of 500.

Noise Volume Reduction:

Stock/UTG Kit Piston *


Piston with Red Accuracy Cup *

The volume reduced by the sorbo pad is hardly noticeable.
If '0' was the quietest but still noticeable clap you can make and '10' were the loudest clap you can make then the sorbo pad would turn a 10 into a 9.


Frequency Reduction:


Stock/UTG Kit Piston **


Piston with Red Accuracy Cup ***

This in my opinion is more important than sound reduction. Lower frequencies are more difficult to hear, especially the older the individual.

Lowering the frequency changes the usual POP sound into a THUD sound. This makes a rifle shot more difficult to hear and more difficult to determine that shot's source. (e.g. It's easier to hear an instrument playing a high note rather than a low note.)

My Type 96 rifle is nearly maximized for volume/frequency reduction so even without a sorbo pad, no mock suppressor, and a m190 spring installed it's extremely quiet. All you can hear is a very faint 'thud' from the BB leaving the barrel. Surprisingly the sorbo pad reduced the frequency of my faint thud a little more!
[I can mention the mods if requested.]

The stock/UTG piston gets a lower score because the frequency reduction was not as much as the Red Accuracy Cup.


Vibration Reduction:

Stock/UTG Kit Piston **

Piston with Red Accuracy Cup *

The vibration reduction from the sorbo pad is two-fold. One, vibration is reduced due to the material absorbing the shock. Two, vibration has reduced because the force that the spring generates has decreased. The sorbo pad takes up space that the spring would otherwise have occupied.

The sorbo pad reduces vibration less for the Red Accuracy Cup because this piston head was designed for durability and reducing impact force. This means a stock/UTG piston would benefit more in terms of vibration reduction-- although hardly noticeable.

Price: *****

$5 is not necessarily a steal, but if you're planning to order other items from EVIKE, a five dollar increase shouldn't break the bank.



Durability of Pad: *****

So far I cannot give an accurate durability rating factoring in time and other outside factors, but I can say that the sorbo pad can take a beating (700+shots) and it hasn't shown any sign of wear yet.

[This section, and all others for that matter, may be subject to change in the future if new data arises.]


Durability Increase of Piston:
*****

One of the primary attractions for AEGs using sorbo pads is a spike in durability increase. I have not tested a piston to failure (i.e. breaking), but in theory this sorbo pad will increase a piston's life by absorbing shock.

It's quite rare for a sniper rifle piston to break, but I'm rating this section a five because this is one of the reasons sorbo pads were made. How can I not give it a 5? :D


Ease of Installation: *****


  1. Clean the cylinder head so there's no dirt/grease (Rubbing alcohol is enough)
  2. Super glue the sorbo pad as centered as possible
  3. Wait for glue to dry
  4. Install cylinder head onto cylinder
  5. Celebrate
Doesn't get easier than that.

Installation of a m210 spring... it's nearly impossible. I tried and tried again, but I could not install it without the fear of tearing the sorbo pad. M190 and weaker springs are installed with no problem.

I have not tested the sorbo pad installed onto a self-polished/beveled cylinder head. Since there is a larger hollow cavity in the middle of the sorbo pad unlike PSS2 sorbo pads, I'm nearly certain that installation is possible on highly tapered cylinder heads as long as it's flatter near the circumference, but I cannot guarantee this.

Accuracy Increase: n/a -- Reason Explained below

Accuracy DOES increase very slightly. But it's mostly due to a "side-effect" of using a sorbo pad.

Inevitably, a sorbo pad will decrease FPS ~5-15 (because it takes space in the cylinder) which in turn increases accuracy.

Given two identical rifles shooting the same BB's-- the rifle with the lower FPS, in theory, should be more accurate.

Miscellaneous:

  • There is a 1/8'' sorbo pad available on the same website. Perhaps this one can be installed in conjunction with a m210 spring(?)<--[Issue mentioned in the installation section]
  • Roughly a 5-15 FPS loss is expected.
  • If you did not read the above sentence please read it now >:D

Overall/Recommendation:

The 3/16'' sorbo pad does not reduce noise volume as most people may have wished, but it DOES lower frequency a bit which is just as good if not better.



Durability increase isn't a big factor for sniper rifles, even with a stock plastic piston. However, if you're afraid of breaking your piston in half for whatever reason, the sorbo pad will help.

Accuracy will increase very slightly due to vibration reduction, but also due to the FPS loss mentioned earlier.





I recommend the sorbo pad for those who want the quietest rifle possible and don't mind the FPS loss. There are literally no downsides besides the loss in power.



Once again, most people may be expecting this sorbo pad to be an ultimate silencing product, but it's very far from that.


If you're trying to squeeze every last ounce of performance from your rifle, then this is something to consider.

-S.S.:shot:
 

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Discussion Starter · #3 ·
The review is up. Any questions or requests for testing are welcome.
 

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I installed the same sorbo pad from the source site www.sorbopads.com and it did wonders to my type 96 set up. The sounds coming from inside the rifle is I would consider 95% deadened. My setup is not stock however. But the sorbopad is superglued to my stock cylinder head installed onto my raven cylinder.

The only noticeable sound now comes from the end of the barrel as expected.

When you listen for the sound...are you listening from when you yourself are firing the rifle? or asking someone else if they hear it. Also, are you firing this indoors? because there can be a good increase in echo if you do so.

Should you want to do a full silencing of your type 96, there's a thread on it in the forum.
 

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Discussion Starter · #5 · (Edited)
The sounds coming from inside the rifle is I would consider 95% deadened. My setup is not stock however. But the sorbopad is superglued to my stock cylinder head installed onto my raven cylinder.
These tests were done with a stock Type 96 with no mods and my primary rifle with maxed sound modifications.

We are using different cylinder heads and pistons so I would assume that others using your setup would experience a greater positive gain. The Laylax Red Accuracy Cup is made for shock absorption and therefore the sorbo pad doesn't do much for this particular setup.

When you listen for the sound...are you listening from when you yourself are firing the rifle? or asking someone else if they hear it. Also, are you firing this indoors? because there can be a good increase in echo if you do so.
I test from various distances using three other people, who are generous enough to donate their time (in exchange for some beer!), outdoors with no external noise in the surrounding. From ranges of 1, 2, 5, 10, 15, 20, 25, 30, etc. In increments of five all the way up to 200 feet. I'm very meticulous in testing performance :shot::cheers:

500FPS & Stock Rifle
:

At 100feet the stock sniper rifle with a sorbo pad was just faintly audible, but just enough to determine the direction of the shot.

At 150 feet if you listen closely you may be able to hear the shot fired, but it's VERY difficult to determine the direction of the source.

^^This was tested by having a friend shoot above my upper torso from any direction around me without me knowing his location. This test was done several times.

Should you want to do a full silencing of your type 96, there's a thread on it in the forum.
I'm aware of the thread, but thank you for the recommendation! inthetallgrass advertises it all the time! :doh: lol jk >:D. My rifle has all the sound reducing mods you can find online and several others which are not mentioned anywhere. I've been obsessed with sound reduction ever since I picked up my first BASR :)

When I was testing my 320 FPS modded rifle w/o the sorbo pad I asked one of my friends to listen closely for my shot at 10 feet out.

He said, "Okay, I'm ready. I'll listen carefully."

I said, "I shot it about 2 seconds ago! I said listen closely!" >:D

That's the reason I decided to do my testing primarily with a 500FPS spring AND a stock rifle.

I personally recommend the sorbo pads as a "cherry on top" if a rifle already has the majority of sound reducing mods.
 

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Props then for the thorough review :)...I guess it is a "cherry on top" for those who have taken siliencing to the limits. I personally Clay Stock modded mine so theres no echo or vibration from within the body whatsoever as well as wrapping the spring guide with a thin layer of electrical tape to kill the metal vibration of the spring.
 

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Discussion Starter · #7 ·
Props then for the thorough review :)...I guess it is a "cherry on top" for those who have taken siliencing to the limits. I personally Clay Stock modded mine so theres no echo or vibration from within the body whatsoever as well as wrapping the spring guide with a thin layer of electrical tape to kill the metal vibration of the spring.
*High five*! :cheers: I clay my stock as well! :D I also foamed certain areas where clay wasn't necessarily the best idea. So a foam+clay hybrid lol. Awesome that you clay yours too... I thought everyone went the foam path :yup:

I only hear a 'sproing' noise with a m210 spring. What spring power do you start hearing a 'sproing' noise, or is it for all springs you use?
 

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I run a PDI SPR 250% and have heard it for mine but it would prolly be more noticeable if the spring becomes a lot stronger. But i have had experience with the spring noise with just stock. So i electric taped the stock plastic spring guide. I also heard that electric taping the end of the spring inside the piston also helps kill the vibes too.

The drawback tho on the clay mod is that our rifles get insanely heavy lol...but I feel its a good balance to the metal front.
 
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