We were discussing these silencers the other day on another forum (
http://www.silencertalk.com/forum/viewtopic.php?f=5&t=81207 is where I quote from, here...)
semperfiusmc said:
John Titsworth said:
Krink's wont suppress well regarless of how quiet the silencer is, neither does any AK platform. You would think people that make suppressors would know this...
We made a Krink hearing-safe with our Kestrel. We made an 10.5" AR machine gun hearing safe too. We also made a user-serviceable 5.56 can out of all stainless that weighs about the same as a Phantom, is shorter than an M4/2000, and quieter than a Halo that I guarantee will have a longer service life than any any welded suppressor. And in the even of baffle strikes or structural failures, we can replace components without having to slice the suppressor apart. I guess that since we don't know the rules and boundaries we are able to surpass them.
As far as the JUST AS GOOD AS subthread, I don't know what as good as means. We produce a great suppressor that can be disassembled and cleaned at a great price. Just in testing our Kestrel I've personally become convinced that user-serviceable centerfire suppressors are going to be a requirement just as rimfire suppressors are.
Emilio said:
No inconel but he says he would replace warn baffles , I woner about high power cans being able to unscrew but it's a good price and nice ideas.
There are multiple sealing surfaces. In all the testing we've done we haven't had a single can come apart during firing, even with sustained machine gun fire.
To which my reply was...
Indeed, those are exceedingly bold claims. Point of fact, if you made a 5.45x39 AK with short barrel (by "Krink" do you mean AKS74-U?) hearing safe you would be the first in the world to do so.
What dB at the ear were you testing? 1m to the side of the muzzle?
What grade of stainless? Any HT on the materials?
Surpass the rules and boundaries - generally smaller manufacturers will duck these questions. Be unique and different and actually answer.
No answer was posted. I remain quite dubious.
It is also interesting to note that there are no dB numbers available on any of the products offered by this manufacturer. "Hearing safe" is not a measurement, but OSHA has guidelines.
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=standards&p_id=9735 said:
Code:
TABLE G-16 - PERMISSIBLE NOISE EXPOSURES (1)
______________________________________________________________
|
Duration per day, hours | Sound level dBA slow response
____________________________|_________________________________
|
8...........................| 90
6...........................| 92
4...........................| 95
3...........................| 97
2...........................| 100
1 1/2 ......................| 102
1...........................| 105
1/2 ........................| 110
1/4 or less................| 115
____________________________|________________________________
Seems that 115dB for a duration of only 15 minutes per day is the highest level that is permissible by OSHA. However, OSHA has this to say about impulse/peak sounds...
OSHA said:
Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level.
Keeping in mind that a short barreled 5.45x39 AK is over 165dB (168dB, near enough) without a silencer, any "hearing safe" silencer for this platform would need to reduce the noise signature by
over 25 dB!
If anyone on here truly believes that a short barreled semi- or full-automatic centerfire rifle can be reduced in noise signature (including action noise, remaining blast, excess gas coming from the action, excess gas leaving the silencer,
everything) to 140dB or under, then I've got a bridge for sale.
Please, wear earplugs.
EDIT: To make things clear, I'm not trying to bash the manufacturer. I simply don't want anyone to damage their ears thinking that what they have is "hearing safe", especially since this entire tirade assumes that at no point during the day is there any exposure to SPL of 90dB or higher. In modern life, this is a completely incorrect assumption.
Truly, hearing loss will hit every single one of us. Why encourage it?