Any first hand Sierra 5 experience?

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PisgahPlinker

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I’ve been back and forth between a Sierra 5 and a Polonium K. Price is negligible between the two with keymo. For use on a dedicated 13.7 p&w with A5H2. Weight advantage to Sierra 5 but not drastic. As a dedicated can I will tune my gun as necessary so gas blowback isn’t a huge concern. I know there were some early reports of weld failure on the Sierras but according to Deadair it was limited to ~10 samples and the rest have been good to go. My LGS has a Sierra 5 keymo in stock so small advantage that I could shoot at their range while in jail, vs Polonium would be via Capitol Armory.

Thoughts? Anyone here been able to shoot a Sierra 5? Bonus points if you have familiarity with both cans
 
Following and also interested. Really thinking about a dedicated 5.56 can.
 
Was going OCL Polonium until I also heard that they are absurdly gassy. If you plan to get an adjustable gas block, I’d say go OCL. Can’t change my gas block so no OCL for me. But they seem to be top notch, especially for the price.
 
barf said:
Was going OCL Polonium until I also heard that they are absurdly gassy. If you plan to get an adjustable gas block, I’d say go OCL. Can’t change my gas block so no OCL for me. But they seem to be top notch, especially for the price.
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The full size polonium is gassy but can be tamed with the right tuning (agb and H3 buffer). The polonium K is much less gassy. I emailed otter creek and they said on anything 12.5” and longer they recommend the K.
 
barf said:
Can’t change my gas block so no OCL for me.
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If this is a concern look Into the BRT Ez tune gas tubes. It essentially chokes down the gas in the tube itself so you get the same effect as an AGB without any of the moving parts or need to remove the gas block on a p&w setup. You can get custom port sizing based on your needs
 
PisgahPlinker said:
If this is a concern look Into the BRT Ez tune gas tubes. It essentially chokes down the gas in the tube itself so you get the same effect as an AGB without any of the moving parts or need to remove the gas block on a p&w setup. You can get custom port sizing based on your needs
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^^^ This ^^^

Owner of many 😎
 
PisgahPlinker said:
If this is a concern look Into the BRT Ez tune gas tubes. It essentially chokes down the gas in the tube itself so you get the same effect as an AGB without any of the moving parts or need to remove the gas block on a p&w setup. You can get custom port sizing based on your needs
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Eh I’m not messing with/replacing any proprietary KAC parts just to run a polonium. Sounds like asking for trouble lol
 
If you look at the NFA forums you’ll see your fair share of dead air baffle strikes, warranty claims, etc. however I personally don’t think they have a disproportionately high number. It’s like saying more chevys will go in for service than Subaru…. Well they also roll 10x more off the production line any given year. I also think dead air has a very favorable track record for warranty service/repairs if needed.
 
PisgahPlinker said:
If you look at the NFA forums you’ll see your fair share of dead air baffle strikes, warranty claims, etc. however I personally don’t think they have a disproportionately high number. It’s like saying more chevys will go in for service than Subaru…. Well they also roll 10x more off the production line any given year. I also think dead air has a very favorable track record for warranty service/repairs if needed.
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It’s safe to say 90% of baffle strikes and alignment issues posted publicly involve dead air products.

No chance in hell they are selling 10x more suppressors than someone like YHM or Silencerco which have virtually zero of the same issues reported.

Dead Air’s QC has been terrible since they switched manufacturers 2 manufacturers ago (google BPI/KG made).
 
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I was under the impression that while QC got shakey during the switch, the issues have been largely resolved since then.

Perhaps I just got lucky with my recent sandman? I've been really pleased with it, and haven't heard much in the way of recent issues. I'm planning to pick up a sierra 5 or a sandman K at some point in the not too distant future.
 
Cole_McD said:
I was under the impression that while QC got shakey during the switch, the issues have been largely resolved since then.

Perhaps I just got lucky with my recent sandman? I've been really pleased with it, and haven't heard much in the way of recent issues. I'm planning to pick up a sierra 5 or a sandman K at some point in the not too distant future.
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There is no doubt when they get it right, it’s a great product. I just can’t imagine waiting a year for your first can just to subsequently incur a baffle strike on your first trip to the range.
 
If you are not married to dead air brand "kg made" has very similar suppressors and are the OEM manufacturer for dead air and Daniel defense. Probably more manufacturers idr off the top of my head.

The polonium is odd that you need to use a strap wrench to switch mounts. I wouldn't be much of a fan of that. Let me know if I'm wrong but I do not see any end caps on otter creeks website so I assume it is not changeable? Dead air has a wide assortment of end caps and even an odd muzzle brake thing that reduces sound by 1db. I would find somewhere you can shoot them or find out what the tone difference between the two are.

Personally between the two I would go dead air so I could crank my mount down with a proper wrench even when the can is hot and not have to wait for it to cool down. Also i'm based as it comes because I have a nomad on my 14.5 with a flash hider 223 endcap. So take it as you will.
 
The Sierra 5 baffle issues I thought weren’t due to strikes but stellite casting issues.

I know DA would fix any issue and there are very few in the wild so it’s hard to say if they have a huge issue that’s about to crop up when they started getting approvals in or if the issue was very small and isolated
 
barf said:
Eh I’m not messing with/replacing any proprietary KAC parts just to run a polonium.
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This is a great point. Outside of selling for a massive loss you are married to a suppressor for life. A rifle or pistol? Screw it I might punt it tomorrow. Getting married to a suppressor that has known gassing issues can pose a problem a few years down the road if the can switches hosts to something more difficult to tune like an AK.
 
I honestly think the latest backpressure craze is a bit of a keyboard argument, brought on by the recent increase in data like pewscience. I’m not saying there isn’t merit to the data, but i think the difference is a lot more glaring on a graph than at the range. The RC2 is a high back pressure can but it’s been the go-to can for serious use for a decade plus. The Saker is a high back pressure can and has been a leader in the civilian market for years.

AR makers want a reputation for being reliable. Nothing kills sales more than reports of unreliability ie short stroking, ftfs, etc. so most off the rack ARs are inherently overgassed so they can cycle any ammo. Toss a device on the muzzle that further restricts the rapidly expanding gasses, and it is inevitable back-pressure is going to further escalate.

I understand wanting to keep a gun in factory configuration, but with the understanding that they’re making that gun as a jack of all trades. If you know you’re going to run it dedicated suppressed with a particular can, why not swap a couple easy parts to optimize it for your use. You can always switch back to a factory configuration if you decide to sell in the future. The beauty of the platform is the modularity and user serviceability
 
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Changing buffers to me is nothing and should be expected. Past that I'm a little annoyed with it. Proprietary gas tubes, fancy buffers or springs I'd rather not mess with.

Keyboard commandos are definitely an issue you have to research who it is before listening to them.

I just despise strap wrenches and think it's a silly design. Even YHM has tools.
 
So I’m thinking about picking one of these up in the next month or so. 2 of my LGS’s have kept these in stock so it is available. I wanted the Xeno version which is cheaper. But after more thinking, I’ll probably get the Keymo due to longer muzzle device/mount options. I tried to find negatives online and seems like there aren’t many.

Any reason why I shouldn’t? I already have a Turbo, Resonator, & MG7 .308. This will be a can for switching between (2) 5.56 rifles.

And for you married men, I’ve already leaped the first hurdle. 04BD1CB1-3E03-44B5-978B-CF57EEC1934E.gif
😂😂😂
 
I would be scared the new brace crap will affect form 4 wait times. I wouldn't wait 1 or 2 months if the wife signed up. No time like the present.

I'd personally buy a rimfire can before another center-fire but it's your life.
 
Lucky63 said:
So I’m thinking about picking one of these up in the next month or so. 2 of my LGS’s have kept these in stock so it is available. I wanted the Xeno version which is cheaper. But after more thinking, I’ll probably get the Keymo due to longer muzzle device/mount options. I tried to find negatives online and seems like there aren’t many.

Any reason why I shouldn’t? I already have a Turbo, Resonator, & MG7 .308. This will be a can for switching between (2) 5.56 rifles.

And for you married men, I’ve already leaped the first hurdle. View attachment 576080
😂😂😂
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I’ve heard it from a few different sources (on the internets, not first hand) that the polonium K exceeds the sierra 5s performance for similar size profiles. Price is about a wash for polonium + Keymo adapter vs sierra 5 with factory Keymo. I don’t think either would be a bad choice, but right now I’m leaning polonium when it comes time to pull the trigger
 
PisgahPlinker said:
I’ve heard it from a few different sources (on the internets, not first hand) that the polonium K exceeds the sierra 5s performance for similar size profiles. Price is about a wash for polonium + Keymo adapter vs sierra 5 with factory Keymo. I don’t think either would be a bad choice, but right now I’m leaning polonium when it comes time to pull the trigger
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I have heard of these before & I’ll need to check it out.
 
patina said:
It’s safe to say 90% of baffle strikes and alignment issues posted publicly involve dead air products.

No chance in hell they are selling 10x more suppressors than someone like YHM or Silencerco which have virtually zero of the same issues reported.

Dead Air’s QC has been terrible since they switched manufacturers 2 manufacturers ago (google BPI/KG made).
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This. Reddit is full of DeadAir baffle/QC issues. And long warranty repair times for said issues.
 
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Fred said:
Dead Air cans and Rugged, specifically Obsidians, are far and away the most common baffle/end cap damage damage reports I've seen. It could be Dead Air's market share is high enough to explain the quantity of issues, but there are a lot of reports.
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Most other brand reports I’ve seen are from user error (not aligning the muzzle device correctly, or checking it for that matter), and weird stuff like the few BCMs turd barrel issues I’ve seen.
 
I’ve got about 2k of 9mm through my obsidian 45. Removed the modular thing and put a 9mm end cap on. I really like it. Finally got my barrel in for the 45 so I’m looking forward to adding the modular thingy and running it some.

at the same time my razor 556 was released from jail. It’s got about 2k as well. Only on a 14.5 middy. I never changed a thing on the AR. POA/POI shift was not enough to matter at 150 yards. Haven’t got past that distance yet. Didn’t change anything and gas isn’t an issue at all. I added the flash hider end cap and it’s noticeable at dusk how well it works.

Maybe I goy lucky. But I’m also paying attention to my can every once in awhile and making sure nothing is loosening.
 
I have one in jail at the moment.
I've seen a post or 2 regarding welding issues within the can but they were addressed and resolved.

I've got a wolfman that I love so I decided to just follow suit with the 5.
 
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