38.1 DB reduction is pretty damn impressive for a 5.56 can, especially for a sub $800 can with one of the best RTZ mounts out there.
Not bad at all. Better than the Omega with 5.56 endcap, though you lose versatility.
It was pretty impressive at a shoot I went to a few weeks ago, Griffin’s line is looking pretty good.
niceee!!
I am looking at the Recce 5 really hard for work use. I am very curious about the flash. Has anyone had any experience with that on this can?
The big negative with a can like this is the mount. I would not trust that mount to stay tight and not work itself loose. If Griffin would have added a locking ring on the outside of the can after you tightened it down, I’d give it a second look. The muzzle suppression is remarkable however, I’m not a Db whore but when you get 55gr 5.56 sub 130Db at muzzle it’s impressive.
I worried about that initially as well, but after putting thousands of rounds through my recce 7 and having friends who have put thousands through their 5’s and 7’s none of us have ever had an issue with it coming loose, nor have I ever read of that happening on the interwebs. If you contact Silencershop they say it’s never been an issue either, and they say that the taper mount type design that Griffin and thunderbeast utilize is the best at rtz after removal in the industry.
Good to know, the taper mount kept me from giving it a hard look. I guess if I’m ever in the market for another 5.56 can I’ll be giving it a look.
My problem is with the 144dB at the ear. Makes all that muzzle suppression worthless, as bullet flight is 150dB, so what am I actually getting? My ears will get hit with 144dB, and my environment with 150dB. Other than that, looks good. I am still in the AAC Mini 4 and Surefire 556 Mini camp, though. Both are quieter at the ear and have less weight/back-pressure.
I was confused reading your post.
Are you saying that if you shot a bolt action 5.56mm with a can, no matter what the claimed DB reduction at the muzzle, everyone would hear 150db due to the bullet flight including the shooter?
No, because a bolt action 5.56 does not have port noise. It would be quieter at the shooter’s ear with the quieter muzzle device.
dB is simply the measure of a sounds peak intensity, not it’s frequency or it’s duration. Sonic boom’s occur at a very low frequency, between .1 - 100 Hz. Also, the duration of that noise is less since the bullet is moving away from you (sonic booms are continuous and degrade over distance). Expanding gasses from the muzzle are far more damaging since they are higher in frequency, and longer in duration. So saying that 150 db from the negates makes suppression at the muzzle somewhat pointless is false IMO. Most of the sound to bystanders and damage to your ear will be from expanding gasses. I think it’s better to only be bombarded by port noise plus the sonic crack, rather than muzzle, port noise and crack.
The loudest insult to the shooters ear is port signature on the m4 platform.
For sure, by peak noise. But the hearing damage isn’t caused by one source, so I think pressure waves from both the muzzle and port need to be considered for actual damage to the shooters ear, as well as sound signature to observers.
I agree, but this is a very complex medical scenario. The correct answer is to always wear earpro. The subjective answer is that my ears ring the same whether I use a fullsize or mini can. Both are far better than no can. By a mile. I prefer to shed weight and reduce backpressure and go with the mini as they sound identical to me. Downrange fullsize is quieter. But again…I care about me. Not the bg or deer.
So looking at the description of the Recce 5 it appears neither inconel or Stallete is used, just stainless steal? I’m guessing this is mean’t to be a low volume use can perhaps an ideal hunting can but not really tactical?
SS can handle some abuse.
It’s not just a standard SS. It’s 17-4PH. It has qualities very similar to inconel but is easier to machine so cost is less, however it does weight more. At 600 degrees 17-4 is actually stronger than at room temp.
17-4ph melting point 1400deg c, Inconel 625 melting point 1290deg c, tensile strength 17-4ph 930mpa, tensile strength 625 Inconel 920mpa.
Inconel 718 and Stellite are improved over both.
I’ve got one in the NFA pipeline. Looking forward to getting my hands on it. It will be my dedicated 556 can. I have a SOCOM 762 and an AE AEM5 already. Damn Class 3 toys are addicting.
From the comparison you just made,it would sound as though the 17-4 SS is as strong as 718 Inconel but easier to work with as you say. I know very little about metallurgy, but I’m wondering why more companies are using Inconel and Stallete and not the 17-4 SS if that is the case.
Do you work for or have some affiliation with Griffin Armament? You seem to know a lot about their cans and post a lot of borderline-shill posts about them.
Also, wouldn’t 718 Inconel be a better comparison, and a comparison of other stats too? There are many equally-or-more important properties for high-heat/high-pressure metal applications than the ones you listed, like thermal conductivity, thermal expansion coefficients, susceptibility to stress cracking, yield strength and toughness, and a ton of other things. A metal that gets really hot really quickly and has a low modulus of elasticity, for example, could potentially be worse for suppressor use than a metal that doesn’t heat up as quickly and has a high modulus of elasticity, even if the first metal may seem stronger by other stats at certain temperatures. You also didn’t list which temps those tensile strengths are at.
The use of 625 Inconel and what appear to be purposefully-obtuse stats seem really fishy here, not to mention that many 17-4PH heat treat conditions lose strength from room temp to 600C (you didn’t specify which unit in your post, C or F, or which condition steel).
Finally, for those who are interested and can understand such data, here are some data sheets on 718 Inconel and 17-4PH steels:
17-4PH: http://www.aksteel.com/pdf/markets_products/stainless/precipitation/17-4_ph_data_bulletin.pdf
718 Inconel: http://www.specialmetals.com/documents/Inconel%20alloy%20718.pdf
(Please note that metals from different vendors may have slightly different specs, even if the metal is the same type)
I won’t claim to know which is the better material for suppressor use as I don’t have the first-hand knowledge of such things or the data that Surefire, Griffin, AAC, SilencerCo, and others have, but the fact that Stellite and Inconel are being used in all the high-end, high-volume, full-auto cans on the market like the SOCOMs and Sakers is, as we say on this board, “a clue,” and I highly doubt it’s just weight. There are also some properties that stand out in those data sheets, like thermal conductivity, that would worry me using 17-4PH as a “just as good” substitute over Inconel, but in my day job, I don’t work with 17-4PH and Inconel, so I will reserve judgment based solely on the data sheets.
Everything here just smells suspicious to me. Color me skeptical.
ETA: this isn’t a bash of Griffin suppressors, just skepticism of some of the info and motivations in the Griffin threads as of late.