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Thread: VIDEO: Subsonic Suppressed 223 / 5.56

  1. #61
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    I am thinking about getting a suppresor for a 6920. A buddy of mine has one setup and was exposing to me that it's not really quite, rather it's just not as loud. We had a discussion about subsonic rounds and he was explaining that while you can get it quite you sacrifice the effectiveness of the round. His explanation was that you might cut the guy(depending on distance) but now he can fire back.

    Since having that discussion I have done some research and read much of what has been posted here. As a result my question is, is it worth it to even buy a suppressor? From the extra carbon build up, lubricant spent, money to buy that actual suppressor what is the real benefit if it's not even going to make it quite? Furthermore, I have read some posts explaining how you have to make modifications to the AR's guts just to make the weapon run properly, so I'm hoping I can get some quality feedback and direction.

    I realize that I may have misunderstood some of the technical aspects of this subject. Are the modifications Grant explains so that the weapon will function reliably with subsonic? If I ran regular ammo through the 6920 with a Surefire suppressor would I need to make further modifications in order for the weapon to run normally?

  2. #62
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    every man needs to own a suppressor...especially for 22LR

    They work amazingly well...I wish I had gotten a good ti 300 can but was on a budget & am stuck w/ 5.56 for now. I shoot a 12.5" fun gun for pigs at night & home protection. About between a 22 & 22 mag but it eliminates muzzle flash, you don't need ear muffs and can communicate in whispers to time shots. SBR's are stupid loud without a can. I personlly would not sub the 5.56 AR. If I was going to can your 6920, I would go ahead and sbr the receiver & cut it down. Carbines with a can get too long for my applications.

    You are going to lob in your shots subsonic whether it's a 40gr .22 or 180gr 30cal...the thud is louder than the gun and very fun to play with.

    Winchester came out with a 22 cb match in 29gr that is the real deal for short range work. I can shoot rats & rattle snakes real close to the blinds w/out spooking the deer to much

    Looks like 300 blackout is the deal for subsonic anyway...I would like to build one of these & a 6.8 in 12.5" as well.

    Doubt you will be sorry but be carefull as they make you start thinking of projects...wallet drainers for sure but very fun.
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  3. #63
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    Regarding the 150 grn 5.56, I bet if you looked around for a heavier metal for the bullet core, you could get a heavy bullet that isn't too much longer than the 77 grn bullets and therefor would work well in a 1in7 barrel.
    C co 1/30th Infantry Regiment
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  4. #64
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    Quote Originally Posted by Artos View Post
    every man needs to own a suppressor...especially for 22LR

    They work amazingly well...I wish I had gotten a good ti 300 can but was on a budget & am stuck w/ 5.56 for now. I shoot a 12.5" fun gun for pigs at night & home protection. About between a 22 & 22 mag but it eliminates muzzle flash, you don't need ear muffs and can communicate in whispers to time shots. SBR's are stupid loud without a can. I personlly would not sub the 5.56 AR. If I was going to can your 6920, I would go ahead and sbr the receiver & cut it down. Carbines with a can get too long for my applications.
    What about if I purchased an upper just for the purpose of running suppressed? For example, when I want to utilize the weapon suppressed I just swap out uppers.

    Quote Originally Posted by Artos View Post
    You are going to lob in your shots subsonic whether it's a 40gr .22 or 180gr 30cal...the thud is louder than the gun and very fun to play with.

    Winchester came out with a 22 cb match in 29gr that is the real deal for short range work. I can shoot rats & rattle snakes real close to the blinds w/out spooking the deer to much

    Looks like 300 blackout is the deal for subsonic anyway...I would like to build one of these & a 6.8 in 12.5" as well.

    Doubt you will be sorry but be carefull as they make you start thinking of projects...wallet drainers for sure but very fun.
    Is this the one you wish you had gotten? And is this the ammo you are recommending? If so I couldn't find a number or way to order that particular ammo.

    My buddy was recommending the Surefire Suppressors seen here.

  5. #65
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    The gas system on the ar is what makes it loud... It dumps right next to your head

    Put the same can on a bolt gun and it will sound like a pellet gun


    If u r looking for a quiet semi, look for the 300 black out vids

    Don't bother with sub 223

    Or add a piston to your gun.... This will stop the gas noise

    I wouldn't look at a surefire for the cash.... Way over priced

    On the low end look at a phantom

    High end aac
    Last edited by Ring; 06-05-11 at 22:59.

  6. #66
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    Quote Originally Posted by Ring View Post
    If u r looking for a quiet semi, look for the 300 black out vids

    I wouldn't look at a surefire for the cash.... Way over priced

    On the low end look at a phantom

    High end aac
    Now I see the AAC requires threading the barrel, is that a drawback? I've read some posts about people having difficulty keeping the can on after a few shots. On a side note, on their site they make it sound like if you use their supersonic rounds with their suppressor it will still be quite. I didn't think that was possible?

    Out of curiosity would the 300 Blackout rounds function with a Surefire suppressor?

  7. #67
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    My first deployment we had 100gr subsonic 5.56. One man in the team would carry it in a surefire suppressed M4. It was VERY quiet and worked well for silencing dogs when trying to infill a SKT.

  8. #68
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    Quote Originally Posted by bravofour View Post
    My first deployment we had 100gr subsonic 5.56. One man in the team would carry it in a surefire suppressed M4. It was VERY quiet and worked well for silencing dogs when trying to infill a SKT.
    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).
    Last edited by Logicalpath; 06-05-11 at 23:59.

  9. #69
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    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.

    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)

    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.

    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

    Hope that helps clear up some things for you

  10. #70
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    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

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