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Thread: VIDEO: Subsonic Suppressed 223 / 5.56

  1. #71
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    Quote Originally Posted by Logicalpath View Post
    Out of curiosity was his M4 standard issue or was there any modifications to it? I only ask because I've read so many posts where individuals have to overhaul the guts for the weapon to perform normally(when using subsonic rounds).
    Standard M4, just with a Surefire CAM4FA556 flashhider. We didn't see any reliability issues.

  2. #72
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    Quote Originally Posted by Ironman8 View Post
    Logical,

    To answer a few of your questions:

    Should you suppress an AR?

    It is totally up to you and what you want to accomplish. Example: for an HD/CQB rifle, overall length of the weapon is my first consideration...which leads to getting an SBR (10.5" if you want the shortest "reliable" length possible)....THEN you have to know that the blast from said 10.5" (especially indoors) is like a mini flashbang going off next to your head...so then you would want to suppress it...what suppressor you go with will also play back into your OAL length consideration....do you want a "mini" suppressor that will at least take the edge off the muzzle blast, or do you want to sacrifice some of the OAL and go with a full sized suppressor....its all up to the user and the niche that that particular rifle will fill.
    If I go this route, in your opinion would it be better to cut the barrel on the 6920 or just buy a whole new upper(10.5")? If so do you or anyone else have an SBR upper that you recommend for reliability, etc(specifically to run suppressed)? As I mentioned in another thread I'm a bit traumatized from an experience with S&W so I'm scared of anything that isn't Colt.

    Also, if I do either cut the barrel on the 6920 or purchase a new SBR upper would I have to purchase two stamps(one for the suppressor and one for the 10.5")?

    Quote Originally Posted by Ironman8 View Post
    Are suppressed AR's "quiet"?

    Not like in Hollywood....unless you are shooting a subsonic round (more on that later)...but suppressed AR's do other things like eliminate muzzle flash and blast, improve communication in a team environment, conceal your location from the enemy, ect....

    Suppressor brands?

    AAC and Surefire are the top two in my opinion. For the money, AAC is best. Don't think anyone will argue that point...and no, you don't have to "thread your barrel" as AAC uses a QD system that is very good...unless you actually want a thread-on suppressor (which I don't recommend)
    Well the reason I asked about that, according to THIS they make it sound like you have to thread "it". If you read on the lower right hand corner they're talking about barrel threading, etc. Would I just be better off buying the upper from them and the suppressor? That way I have the whole "kit and kaboodle" in one shot?



    Quote Originally Posted by Ironman8 View Post
    Subsonic rounds?

    Don't have as much knowledge in this area as others, but some will cycle, some won't. Period. The ones that do cycle will be a hell of a lot more expensive, but neither will be as ballistically effective as say TAP T2 ammo. For 99% of shooting that you will do, subsonic is unnecessary.
    If you were shooting inside of your home with a can but with supersonic rounds would it be bearable? I've watched some videos already but there is no explanation on what kind of rounds specifically they're shooting. From what I've read on the SureFire chart is that it reduces it to 137 decibels(that's the highest one) from roughly 158 decibels. Now I don't know much about harmful sounds but that doesn't seem like much to me. And according to what I have read, OSHA tops out at 115db & indicates that it should be for less than 25 minutes. I'm not trying to say that OSHA is reliable most Gov't agencies are not but it's the only information I could find.

    Quote Originally Posted by Ironman8 View Post
    Modifying your rifle?

    Shoot, you may have to do this shooting unsuppressed/suppressed/with or without subsonics....just the nature of the beast with ARs...just get your gun running reliably and be done with it.
    Understood, I've already done quite a bit of adding on but when it comes to the guts of the weapon I am a little leery. I'd almost prefer to purchase an upper for specific situations but I'm still new to most of this stuff and don't know if that's the right way to go.

    Finally, thank you for taking the time to explain all of this in detail. My understanding is much better now, there isn't a whole lot of information available on this topic online...outside of these forums anyway. Not just that but my guess is googling most of this stuff get's someones attention, LOL.

  3. #73
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    Quote Originally Posted by Ring View Post
    All cans are theaded or qd, most qd's use a ratchet type... They won't come loose


    Threaded can "should " use a locking type washer

    My AWC has a bi-lock washer... But on my bolt gun it's not needed


    Watch the YouTube vids for 300blk

    Seeing/hearing is beleaving

    300 must be shot threw a 30cal can
    Aac's 300blk can is smaller then a "308" can
    I've actually watched a few but there are no specifications as to what they're running when it comes to ammo. Which is where I am focusing my research, mainly because I've seen so many people post about issues running subsonic. That said, if AAC makes a suppressor that shoots quite with the 300blk rounds & shoots reliably then I'll go that route.

  4. #74
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    Quote Originally Posted by bravofour View Post
    Standard M4, just with a Surefire CAM4FA556 flashhider. We didn't see any reliability issues.
    Thanks, I appreciate the information and at least I know that the Surefire is reliable if I can't go with the AAC for whatever reason.

  5. #75
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    Quote Originally Posted by Logicalpath View Post
    If I go this route, in your opinion would it be better to cut the barrel on the 6920 or just buy a whole new upper(10.5")? If so do you or anyone else have an SBR upper that you recommend for reliability, etc(specifically to run suppressed)? As I mentioned in another thread I'm a bit traumatized from an experience with S&W so I'm scared of anything that isn't Colt.

    That is really up to you. I know I would prefer to have both, different applications for each barrel length...the problem with cutting a barrel is that now your gas port is out of spec for the now shorter barrel...shooting suppressed "could" remedy this (due to the backpresure), but you might have to play around with it....Noveske, LMT, BCM, DD, Colt are all reliable...I've drank the Noveske cool-aid and I like it

    Also, if I do either cut the barrel on the 6920 or purchase a new SBR upper would I have to purchase two stamps(one for the suppressor and one for the 10.5")?

    Yes, unless you weld a suppressor to the end making the "barrel" 16+" (don't recommend that)



    Well the reason I asked about that, according to THIS they make it sound like you have to thread "it". If you read on the lower right hand corner they're talking about barrel threading, etc. Would I just be better off buying the upper from them and the suppressor? That way I have the whole "kit and kaboodle" in one shot?

    Yeah I saw that...don't really know what they mean by that. The 762-SDN-6 suppressor that they make for their AAC Blackout definitely uses their QD flash hiders/brakes so I don't know why you would need a thread protector...unless it comes with two separate barrels???

    Also, about the 300BLK round, its supposed to be a great round especially for suppressed shooting, but as far as I know, there is only 2-3 loadings for this caliber and the ammo is pretty hard to find an expensive...I personally would wait for the round to either catch on and be mass produced or just die out...




    If you were shooting inside of your home with a can but with supersonic rounds would it be bearable? I've watched some videos already but there is no explanation on what kind of rounds specifically they're shooting. From what I've read on the SureFire chart is that it reduces it to 137 decibels(that's the highest one) from roughly 158 decibels. Now I don't know much about harmful sounds but that doesn't seem like much to me. And according to what I have read, OSHA tops out at 115db & indicates that it should be for less than 25 minutes. I'm not trying to say that OSHA is reliable most Gov't agencies are not but it's the only information I could find.

    The "OSHA threshold" is 140 dB...most suppressors will put you below that, but inside of a house, I would imagine that it would still make your ears ring...but if you are in a life or death situation where you had to fire inside your house, auditory exclusion would kick in and you probably wouldn't even hear an unsuppressed rifle go off...which is why I am going for a mini suppressor for a 10.5" SBR so that I can minimize OAL while at least dampening blast (about 142 dB)


    Understood, I've already done quite a bit of adding on but when it comes to the guts of the weapon I am a little leery. I'd almost prefer to purchase an upper for specific situations but I'm still new to most of this stuff and don't know if that's the right way to go.

    Finally, thank you for taking the time to explain all of this in detail. My understanding is much better now, there isn't a whole lot of information available on this topic online...outside of these forums anyway. Not just that but my guess is googling most of this stuff get's someones attention, LOL.

    Not a problem...I'm still learning myself. Just read alot and ask questions when you know enough what to ask for
    Answers are in red...btw how the hell do you multi-quote a post??? Still haven't figured that out!
    Last edited by Ironman8; 06-06-11 at 11:19.

  6. #76
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    Quote Originally Posted by Ironman8 View Post
    Answers are in red...btw how the hell do you multi-quote a post??? Still haven't figured that out!
    Some vBulletin forums have a multi-quote button(these do not), what I do here is when I quote someone I copy the following code: quote=ironman8;1016393 and put it in these brackets [ ]. When I want to stop the quote I put the following code: /quote in these brackets [ ]. I'll do that throughout the post so that I can break up my responses. There may be a better way to do this on these forums but I have not seen the options for it.

  7. #77
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    Quote Originally Posted by Logicalpath View Post
    Some vBulletin forums have a multi-quote button(these do not), what I do here is when I quote someone I copy the following code: quote=ironman8;1016393 and put it in these brackets [ ]. When I want to stop the quote I put the following code: /quote in these brackets [ ]. I'll do that throughout the post so that I can break up my responses. There may be a better way to do this on these forums but I have not seen the options for it.
    Yep. I just manually do it too. I'll hit the QUOTE button on the first reply I want to hit. Then copy and paste that into the other reply I want to quote. Or just manually type the [ QU0TE] thingies and break down the reply into chunks.
    "You people have too much time on your hands." - scottryan

  8. #78
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    Quote Originally Posted by markm View Post
    Yep. I just manually do it too. I'll hit the QUOTE button on the first reply I want to hit. Then copy and paste that into the other reply I want to quote. Or just manually type the [ QU0TE] thingies and break down the reply into chunks.
    Haha ok I've done that before, but I was thinking "there's GOT to be a better way!" lol

  9. #79
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    Here are the specs. and pics of the SS .223 that I load.

    Re size and regular prep of case.
    When setting up my SS case's I drilled the flash hole's out to 9/64".
    Use Magnum primer's.
    77 grns bullet's I use 5.7grns of TrailBoss and 69 grns bullet's I use 5.4 grns.
    When loading the bullet I invert it and load the point into the case. I originally shot these out of my suppressed Rem 700 and now also shoot these out of a SwitchBlock endowed upper.

    Here is the source that I used to develop the rounds, he is loading SS 762x39 but it can be applied to any rifle caliber.

    http://members.shaw.ca/cronhelm/DevelopSubsonic.html

    http://members.shaw.ca/cronhelm/762ProjectRifle.html
    Attached Images Attached Images

  10. #80
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    Quote Originally Posted by Toxicodendron View Post
    Here are the specs. and pics of the SS .223 that I load.

    Re size and regular prep of case.
    When setting up my SS case's I drilled the flash hole's out to 9/64".
    Use Magnum primer's.
    77 grns bullet's I use 5.7grns of TrailBoss and 69 grns bullet's I use 5.4 grns.
    When loading the bullet I invert it and load the point into the case. I originally shot these out of my suppressed Rem 700 and now also shoot these out of a SwitchBlock endowed upper.

    Here is the source that I used to develop the rounds, he is loading SS 762x39 but it can be applied to any rifle caliber.

    http://members.shaw.ca/cronhelm/DevelopSubsonic.html

    http://members.shaw.ca/cronhelm/762ProjectRifle.html
    That must have been a huge pucker factor when you pull the trigger on one of those rounds for the first time!

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