Suppressors Subsonic 300 Blackout Suppressor Short Can Short List

SDCH300

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Jan 20, 2022
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Hi! New to this forum, but it looked like the right place to get some feedback on suppressors.

I'm ready to buy a can just for use on a 300 Blk subsonic, 8" barrel, occasional supers. I prefer short and light to keep weapon size compact. I've narrowed it down to the few below, based on any quality sound tests I could track down. As well as company rep, apparent quality, and engineering. I've eliminated the Nomad 30, as testing showed the Ti version slightly better at subsonic levels and 4 oz lighter. I can't find any subsonic testing on the Dominus CB, or testing of any kind on the new Sig SLH cans.

Can anyone that owns any of these or has tested any side by side give me some feedback?

Dominus CB seems like the perfect can for me. Only concern is TBAC has a history with bolt action rifles, where high back pressure doesn't really matter. High pressure appears better at controlling first round pop, but not so good for keeping gas out of your face on semi-autos. Does the Dominus flow through much better that than the Ultra 7 or 9? Rated as having very high back pressure level by Pew. Also, I can't find any sound testing TBAC has done with 300 subs, only 308 supers.

SLH762 looks promising, as the old SRD762 was the top rated can by Pew for 300 subsonic. I've contacted Sig many times asking how the SLH compares with the older SRD shooting 300 subs. No replies - ever. These babies are finally showing up at dealers, someone please test them!

Nomad Ti is super light, quiet, with low back pressure. However, it's not designed for extended rapid fire. But I don't really do mag dumps, so probably wouldn't be any issue. More the Ferrari of this group. Abuse at your own risk.

Half Neslon is the oldest of this group? On a few tests I came across it tested a bit lower than the Nomad 300 sub and quite a bit lower using 308 supers (Trash Panda version). It has pretty high first round pop. Some complaints of quality control. Owners seem to love these cans. The company owner not so much.

Thanks!
 
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Clayman

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Nomad Ti, you won't be disappointed.

If you're doing mostly subs firing rate isn't as important. Keep it under 800⁰ F and you shouldn't have a problem. That's like 3-4 mags of full auto supers iirc.
 
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alamo5000

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My .02 cents is to not worry so much about advertised DB numbers. Yes you should take it into account but in my opinion it's not the first item on the list.

The mount to me is the biggest thing. I tend to avoid things with moving internal parts. Things like a 51T mount for me is an absolute no.

Size and weight definitely matter but so do things like what I call "gas flow" (my own terminology). That means some cans can choke off the muzzle and produce great numbers there, but on a semi auto that means more noise at the port. Several manufacturers now try to balance the gas flow for semi auto use. They might show up as slightly louder at the muzzle but overall they are much better.

For 300BLK sound will be determined a lot based on the ammo choice. I've had my bell rung by 'subsonic' ammo before. Cheap ammo or powders not optimized for your barrel length plays a huge factor in the big picture. If you reload you can tailor make what you want.

Lately I've come to appreciate the tubeless suppressors. Several companies make them. Overall I really like that design.

Anyway those are my criteria not yours. I posted them up so you can see what things you can sharpen up in regards to your search.
 

goatboy

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Look at Q Half Nelson. I’ve got a full Nelson on a short mcx, I think the can is longer than the barrel. But, she quiet.

here’s Some love for Q on 300bk.

Also a good discussion of suppressing 300bk here
 

SDCH300

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Hey Zak,

Thanks for the video link. I did come across it. A couple of things, I don't see that you metered the unsuppressed rifle to get a reference level. Hard to know the reduction level without knowing the base db. Also, I wish you guys would have compared it with the competition, as you've done in other videos.

How about a shoot out with the others on my list! : )
 

SDCH300

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Clayman. Thanks for that feedback. I've been wondering if shooting pretty much only subsonic would be easier on the cans.
 

alamo5000

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Clayman. Thanks for that feedback. I've been wondering if shooting pretty much only subsonic would be easier on the cans.
Yes, but.

My experience shooting primarily subs says it's a good idea to check out the threads on cleaning a sealed suppressor.

It will get dirty relatively faster. Don't take that to mean you must clean all the time, but every few thousand rounds is a good baseline to go by.
 

SDCH300

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Hi Alamo500. Agree totally on ammo being a factor. I've been testing a lot of subsonic ammo with an ME Ghost Flash Hider (single cone style sound redirect) and have found that regardless of the grain weight, they vary a lot in terms of engery and sound. Regardless of what's printed on the box. So far the extremes are S&B feels like the softest shooting with the least amount of noise. Winchester Super Suppressed the most kick and loudest. Others fall in between.
 
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alamo5000

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Hi Alamo500. Agree totally on ammo being a factor. I've been testing a lot of subsonic ammo with an ME Ghost Flash Hider (single cone style sound redirect) and have found that regardless of the grain weight, they vary a lot in terms of engery and sound. Regardless of what's printed on the box. So far the extremes are S&B feels like the softest shooting with the least amount of noise. Winchester Super Suppressed the most kick and loudest. Others fall in between.
The quietest factory ammo I've ever shot is Beck Ammo. The 194 expanding sub is woo quiet.

My quietest load that I've cooked up is a 225 grain Hornady bullet over some Accurate #9.

As far as loud ammo goes there is too much to pick from. I normally don't shoot factory ammo but I can recall the Remington Green and White box being really loud.
 

SDCH300

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Hey goatboy. The Half Nelson is still in the running. It just seems to be a bit overpriced in this group for the reasons I outlined in the original post. I tried to base my short list on what's important to me and the best suppressors available that match it. I was trying to avoid the general "what suppressors do you like" approach. Everyone has a favorite.
 

Clayman

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SLH762 looks promising, as the old SRD762 was the top rated can by Pew for 300 subsonic. I've contacted Sig many times asking how the SLH compares with the older SRD shooting 300 subs. No replies - ever. These babies are finally showing up at dealers, someone please test them!

Nomad Ti is super light, quiet, with low back pressure. However, it's not designed for extended rapid fire. But I don't really do mag dumps, so probably wouldn't be any issue. More the Ferrari of this group. Abuse at your own risk.

Half Neslon is the oldest of this group? On a few tests I came across it tested a bit lower than the Nomad 300 sub and quite a bit lower using 308 supers (Trash Panda version). It has pretty high first round pop. Some complaints of quality control. Owners seem to love these cans. The company owner not so much.

I believe Alex at ANR Design has said that the SLH is definitely not as quiet as as the SRD. But sig is going for maximum flow rate to reduce gasses to the shooter's face. I wouldn't expect it to do so well head to head with the old cans or some of the cans listed here.

I have shot the Nomad Ti, Helios QD, omega 300, and half nelson on subsonic 300 blk 9" semi and 8" bolt gun. The Nomad Ti is pretty impressive. Very light and sounded the best out of that group in my and a friend's opinion. Ammo was discreet ballistics subs.

@AndrewKing of otter creek labs will be releasing his new Hydrogen suppressor and the 7" might be right up your alley. IIrc he said they perform very well with 300 blk. The S version is 7" and 9.5 oz. Maybe he can speak to their performance.
 

FuhQ

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    Hi! New to this forum, but it looked like the right place to get some feedback on suppressors.

    I'm ready to buy a can just for use on a 300 Blk subsonic, 8" barrel, occasional supers. I prefer short and light to keep weapon size compact. I've narrowed it down to the few below, based on any quality sound tests I could track down. As well as company rep, apparent quality, and engineering. I've eliminated the Nomad 30, as testing showed the Ti version slightly better at subsonic levels and 4 oz lighter. I can't find any subsonic testing on the Dominus CB, or testing of any kind on the new Sig SLH cans.

    Can anyone that owns any of these or has tested any side by side give me some feedback?

    Dominus CB seems like the perfect can for me. Only concern is TBAC has a history with bolt action rifles, where high back pressure doesn't really matter. High pressure appears better at controlling first round pop, but not so good for keeping gas out of your face on semi-autos. Does the Dominus flow through much better that than the Ultra 7 or 9? Rated as having very high back pressure level by Pew. Also, I can't find any sound testing TBAC has done with 300 subs, only 308 supers.

    SLH762 looks promising, as the old SRD762 was the top rated can by Pew for 300 subsonic. I've contacted Sig many times asking how the SLH compares with the older SRD shooting 300 subs. No replies - ever. These babies are finally showing up at dealers, someone please test them!

    Nomad Ti is super light, quiet, with low back pressure. However, it's not designed for extended rapid fire. But I don't really do mag dumps, so probably wouldn't be any issue. More the Ferrari of this group. Abuse at your own risk.

    Half Neslon is the oldest of this group? On a few tests I came across it tested a bit lower than the Nomad 300 sub and quite a bit lower using 308 supers (Trash Panda version). It has pretty high first round pop. Some complaints of quality control. Owners seem to love these cans. The company owner not so much.

    Thanks!
    Dead Air Nomad-30, Nomad-Ti, Nomad-L, Nomad-LT, or Sandman-S would get my vote.

    My Dead Air Nomad-LT on my 16" .300 BLK with subs is REALLY quiet. Like as quiet as you can get an AR without cutting off the gas completely.

    And my Sandman-S cans also sound great on there...Nice deep tone. Very quiet.
     

    SDCH300

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    Hey Clayman. Thanks for that info. Just the insight I was looking for. As for Sig. They've been pretty clear that flow rate is their new holly grail. However, according to all their press releases the SLX line is supposed to address that. The SLH line is focused on sound suppression rather than flow. Of course, they provide zero data to back that claim up!
     

    SDCH300

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    Hi FuhQ. Thanks for the feedback on your Nomad LT. I'm trying to stay as short as possible. 6" to 7" appears to be the minimum length that deliver good sound suppression. There are certainly many longer options that are great, but I built this 300 Blk to be light and compact. I don't want to add an 8" to 9" suppressor onto the 8" barrel.
     
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    The Godfather

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    Might want to look at the tbac fly 9 as a possibility. Smaller, lighter and easier to clean. Also provides the ability to run on a pistol host if you want.
     

    91Eunozs

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    Have several flavors of cans and shoot a lot of 300 BLK… There’s nothing magical about the round, but the relatively small case volume to bullet size/length does mean it burns off very quickly if you use the right powder. This is why an 8-9” barrel works so well for this caliber.

    I’ll echo what others have said, you get a lot of variation based on the ammo. I happen to load my own for about 2/3 of what I shoot now, so can control the variation for the most part. I load my 300BLK rounds exclusively with ‘hand gun’ powders; primarily H110 or Accurate 1680: 9-10 grains or so for subsonic, 19-20 or so for supers. Regardless of what you load or buy, the key to a quieter can is suppressor volume. Flow and design are obviously important, but in my experience, bigger can = quieter shot.

    Have some can specific for use on specific rifles/pistols, but for shooting 300BLK (and .308, 6.8, and 5.56) I normally use a couple older AAC 762 cans…SD and a SDN-6; both work well on 300BLK. Also have a monstrous Bowers 458 veradapt can that is the quietest, but is longer than most of my 300BLK barrels…probably heavier too. LOL

    Here’s the longer SD can on a 300BLk pistol:

    i-7bgLsgR-X5.jpg


    The SDN-6 is usually found on an 8” 300BLK upper under a cf hand guard on my son’s SBR:

    i-xxL3hgp.jpg


    crap older pic, but the only one I can find of this one right now without the hand guard covering it up:

    i-pD5QB8t.jpg


    and a pic of that huge Bower’s can…on a 10.5” 450 BM upper here:

    i-KGMhBDg-X3.jpg


    The one I keep on a 300BLK upper in the house though is a little TBAC 5C ….

    i-2F2f2v9-X3.jpg


    Lowers the report just enough with subs to not make my ears bleed…though I’ve never shot it indoors without hearing protection, and hope I never have to.

    Just got my Dead Air 9mm Wolfman out of jail too, but haven’t tried it with 300 BLK subs yet.
     
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    beetroot

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    Hi FuhQ. Thanks for the feedback on your Nomad LT. I'm trying to stay as short as possible. 6" to 7" appears to be the minimum length that deliver good sound suppression. There are certainly many longer options that are great, but I built this 300 Blk to be light and compact. I don't want to add an 8" to 9" suppressor onto the 8" barrel.

    There are non US based companies that make considerably shorter suppressor.
    ASE Utra of Finland is probably the most notable in that they make some that are only 4" and rated for all but magnum/short mag catridges.
    There are a bunch more in Europe and lots in New Zealand that make over barrel ones that are 8" over all length but only 4" added length.

    With cartridges like 300BLK with so little powder behind them it seems very unlikely that shorter suppressors could not be made in US that were strong enough with effective sound reduction.
     

    db2000

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    Don’t have experience with the sound suppression yet but my Omega does a good job. It’s a little longer.
     

    FuhQ

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    Hi FuhQ. Thanks for the feedback on your Nomad LT. I'm trying to stay as short as possible. 6" to 7" appears to be the minimum length that deliver good sound suppression. There are certainly many longer options that are great, but I built this 300 Blk to be light and compact. I don't want to add an 8" to 9" suppressor onto the 8" barrel.
    Then I would opt for the Sandman-S. It's 6.8" long, and would be perfect for your needs. Great sound suppression, minimal blowback, excellent tone.
     

    Ape_Factory

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    Using an OSS (now known as HUXWRX because that's easier to remember) 762Ti which is fairly short and light and won't affect the operation of the rifle on or off, sub or super, less gas in the face. Still laugh out loud quiet with subs. The new 762 now has a flash suppressor cap too.
     

    iflyskyhigh

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    Just picked up a DA Nomad L, Sandman S, and Sandman K last week.

    All observations are completely unscientific.

    On the 9.5” Blackout SBR the Nomad L is bananas quite.

    Sandman S is still very quite but no where near as quite as Nomad L.

    Sandman K is still okay with subs and ear pro, but it’s starting to get a little poppy.

    For reference I also have a Griffen Optimus and Revo 45. Have used both on the blackout. It probably falls somewhere between S and K.

    I’m using my Nolser 190gr CC reload subs at 1070ish FPS .

    A Bootleg adjustable BCG and Griffen SNATCH charging lever. These cut down on gas face big time. Especially in 5.56.

    Each of the DA‘s above will be dedicated to. Specific rifle. Just wanted to test them all on the Blackout before making a decision on a dedicated can.

    At this point a little torn on sticking with another Nomad L or just going with the Nomad For the Blackout SBR. I’m guessing the Nomad would supply 99% of the suppression while keeping the form factor small.

    I’m leaning toward the Nomad With Key-mo. Tried both and the direct thread does produce a different tone and maybe even a slight db reductio, but I want the brake and key mo on the SBR. I also have an 18” Blackout I hunt coyotes with and will probably use the Nomad on there as well so the key mo will make it easy to move back and forth. And allow for unsuppressed shooting as well.

    The Nomad L will live on a 308 direct thread.
     
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    FuhQ

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    Just picked up a DA Nomad L, Sandman S, and Sandman K last week.

    All observations are completely unscientific.

    On the 9.5” Blackout SBR the Nomad L is bananas quite.

    Sandman S is still very quite but no where near as quite as Nomad L.

    Sandman K is still okay with subs and ear pro, but it’s starting to get a little poppy.

    For reference I also have a Griffen Optimus and Revo 45. Have used both on the blackout. It probably falls somewhere between S and K.

    I’m using my Nolser 190gr CC reload subs at 1070ish FPS .

    A Bootleg adjustable BCG and Griffen SNATCH charging lever. These cut down on gas face big time. Especially in 5.56.

    Each of the DA‘s above will be dedicated to. Specific rifle. Just wanted to test them all on the Blackout before making a decision on a dedicated can.

    At this point a little torn on sticking with another Nomad L or just going with the Nomad For the Blackout SBR. I’m guessing the Nomad would supply 99% of the suppression while keeping the form factor small.

    I’m leaning toward the Nomad With Key-mo. Tried both and the direct thread does produce a different tone and maybe even a slight db reductio, but I want the brake and key mo on the SBR. I also have an 18” Blackout I hunt coyotes with and will probably use the Nomad on there as well so the key mo will make it easy to move back and forth. And allow for unsuppressed shooting as well.

    The Nomad L will live on a 308 direct thread.
    I told yall the Nomad-L and LT (titanium) were stupid-quiet with subs... 😏
     

    kthomas

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    Maybe look at the short and fat cans.

    KGM R30/K, Abel Co. Biscuit, Rex, etc.

    Short, but with a bigger OD to help with some suppression.
     

    Ledzep

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    Nomad L and Dominus are the best I've used for 1st round pop and general suppression with a subsonic blackout setup.
     

    iflyskyhigh

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    Went with a Standard Nomad for the BO SBR. I’ll see how it works. maybe I’ll still order another Nomad L? I have a problem.

    BTW I have the DA E-Brake on all the cans. I really like the look and effect. It makes Nomad L real LONGGGGGGG. Plan on putting one in the Nomad as well
     
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    Hoser

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    I have several 30 caliber cans that I have used for 300 Whisper/Blackout. Both semi/full auto and also subs/supers.

    Right now the best of them all is my TBAC Dominus. For me it is the best for noise, muzzle flash and weight. I like my Dominus-K also, but it is a touch louder indoors. I have also tried my Ultra 5 and 7, but keep coming back to the Dominus. I have also used some various 9mm and 45 caliber cans for subs, but you might as well use an Ultra 7 for that much weight/length.
     

    FuhQ

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    Went with a Standard Nomad for the BO SBR. I’ll see how it works. maybe I’ll still order another Nomad L? I have a problem.

    BTW I have the DA E-Brake on all the cans. I really like the look and effect. It makes Nomad L real LONGGGGGGG. Plan on putting one in the Nomad as well
    I don't think you'll be disappointed, but there's nothing wrong with also adding a Nomad-L or Nomad-LT to the collection. 😏

    You can never have too many... I just bought cans 6 & 7 a few weeks ago. You start buying suppressors like you used to buy guns, and you will want to suppress everything you own (that can be suppressed).
     
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    iflyskyhigh

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    I don't think you'll be disappointed, but there's nothing wrong with also adding a Nomad-L or Nomad-LT to the collection. 😏

    You can never have too many... I just bought cans 6 & 7 a few weeks ago. You start buying suppressors like you used to buy guns, and you will want to suppress everything you own (that can be suppressed).
    Ya...Nomad was number 7....better investment than the market or real estate right now.

    Spent all day today shooting the DA Mask on my Savage MKII SV-SR and Ruger Mark III. Makes me happy.
     
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    FuhQ

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    Ya...Nomad was number 7....better investment than the market or real estate right now.

    Spent all day today shooting the DA Mask on my Savage MKII SV-SR and Ruger Mark III. Makes me happy.
    The Mask can't be beat. I love mine. IMO, it's the best rimfire can ever made. Super quiet, no FRP, concentric blast baffle for precision, and rated up to 5.7x28. Not to mention 17-4 baffles for ultrasonic cleaning. 👍🏼
     

    iflyskyhigh

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    The Mask can't be beat. I love mine. IMO, it's the best rimfire can ever made. Super quiet, no FRP, concentric blast baffle for precision, and rated up to 5.7x28. Not to mention 17-4 baffles for ultrasonic cleaning. 👍🏼
    Sorry. I know I’m topic drifting but you read my mind. I was just cleaning the Mask and guns from the shoot last Friday and was wondering about the baffles. I clean the baffles from my Griffen Optimus and Revo in my tumbler with stainless pins (come out shinny and new btw), and was wondering if I could throw these in there as well. 17-4, they should be fine, right? I have an ultra sonic too if need be.
     

    FuhQ

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    Sorry. I know I’m topic drifting but you read my mind. I was just cleaning the Mask and guns from the shoot last Friday and was wondering about the baffles. I clean the baffles from my Griffen Optimus and Revo in my tumbler with stainless pins (come out shinny and new btw), and was wondering if I could throw these in there as well. 17-4, they should be fine, right? I have an ultra sonic too if need be.
    I'd assume they'd be fine, in the stainless media tumbler, but i'd check with Dead Air first before doing so. I DO know they are ultrasonic safe, I clean mine in there all the time.
     

    FuhQ

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    After shooting a 150-200 rounds of 220 subs this weekend out of the .300 BLK with 4 different cans... The L cans were the quietest, of course... But, the best all-around mix of length, weight, and suppression out of the 4 was the Otter Creek Labs Hydrogen-S. I'm almost 100% sure it's my new dedicated .300 BLK can. I haven't shot a Nomad-Ti, but I can bet that it's right on par with one. I've bought all of my cans, so I'm being 100% unbiased and honest when I say that I'm downright impressed with the OCL cans. 👍🏼


    C0790D14-CE89-4BB2-AA9D-B35B1A4935C4.jpeg
     
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