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Thread: 5.56mm Suppressor Questions...

  1. #1
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    5.56mm Suppressor Questions...

    I’ve been thinking of going to the next level with my collection, and get a 5.56mm rifle suppressor. Unfortunately, I don’t have much opportunity to shoot suppressed weapons, so I’d like to pick your collective brains.

    I can’t SBR in WA state, so I’ll be mounting it on 16” guns (semiauto). Therefore, I’d prefer to keep the OAL as little as possible. It will spend 90% of it’s time on one particular rifle (a 6920 or possibly a BM ACR). However, I’d like to shoot without it and also mount it on other guns from time to time. So, a QD or QD-like attachment would be nice (if I can get the can off and on in less than 10 seconds, and the flash hider stays on that is sufficiently QD for me). Minimal POI shift would be nice (if it’s less than 1-2 MOA, I would be happy). Obviously, I’d like to keep the weight down too.

    I’d like to shoot the can dry, and would like to go without hearing protection outdoors for at least a few rounds (I’ll wear plugs when messing around on the range). I’d also like to avoid too much permanent hearing loss if I touch off a couple rounds indoors.

    As far as cost goes, I know NFA isn’t a cheap game to play. I’d like to get a suppressor and mount for about $1000 (not including the stamp). I know the Surefires are more, and I’d be willing to stretch for it if they offered a compelling advantage over some other choices.

    So, I’ve asked for the moon and the stars. Here are my desires in order:
    -Minimal addition to OAL
    -QDish capability (off and on in less than 10 seconds, but I want the flash hider/mount to stay)
    -Good dry sound suppression performance (hearing safe outdoors, for at least a couple of shots)
    -Minimal POI shift (1-2 MOA)
    -Lightweight (I see most cans are in the 15-20 oz range, so I’d like to stay in there, the lighter the better)

    So far, the list of cans I’m researching is:
    Ops Inc 15th
    AAC M4-2000
    Surefire FA556AR

    I won’t start another pissing contest by asking “Which is better?”, but I would like to ask some specific questions about them:

    I see most guys prefer the Surefire FA556K to the FA556AR model. My assumption is that it’s because the K is better for SBRs. But are there other performance differences between the two that would make the K a better choice for my application? When I looked at the specs, I thought the AR was more suitable because of its reduced overall length added. But it seems there are way more K’s being run than AR models (at least from what I’ve seen on the boards). Am I missing something?

    AAC seems to have a dizzying array of cans. I like the size of the SCAR-SD and 416-SD models, but assume that they traded some level of sound suppression for that reduction in size (per the specs from the AAC website). I know the specs say they are louder, but is that a significant difference? For those that have shot them side by side, is the SCAR-SD (or 416-SD) significantly louder than the M4-2000?

    Thanks for your time.

  2. #2
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    Check out the latest offerings from AAC they have some nice looking cans. Surefire and OPS might drag you over the 1K mark. You also have to factor in the 200 dollar tax stamp and the cost to get the can transfered.
    Love you Pop. F*ck Cancer.

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    Quote Originally Posted by Voodoochild View Post
    Check out the latest offerings from AAC they have some nice looking cans. Surefire and OPS might drag you over the 1K mark. You also have to factor in the 200 dollar tax stamp and the cost to get the can transfered.
    I've downloaded the 2008 AAC catalog. Nice!

    I've set the limit on the budget around $1k without including the tax stamp or transfer costs. I'll pay them either way, no matter what can I get. I figure I'll be into this close to $1500 with stamp, can, and an extra mount.

  4. #4
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    Shucks, Cleatus.

    For what you're describing, the M4-1000 would be plenty. The 08 version has full circumfrential welding and more inconel in the construction. Although, I'd get a current model and shave 6-9 months off of the wait for the 08s to get produced.

    The $400 savings would pay for your stamp and some ammo.
    "You people have too much time on your hands." - scottryan

  5. #5
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    With the cans you've listed you are practically splitting atoms it's so close.

    They will all sound about the same, and they all claim minimal POI shift.

    I would get a hard quote on the SF cans before moving forward though. If you are guessing at the prices based on MSRP you might be surprised when you get an actual price.

    The OPS can may require barrel contouring, or collar installation, so you may want to get quotes on that service if you can't, or don't want to do it yourself.

    To save a significant amount of money, you should consider the YHM SS Phantom, or the M4-1000. Both cans will hold up under intense semi auto fire, and both claim similarly minimal POI shifts. For about 33% ++ less than the others.

  6. #6
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    Quote Originally Posted by SHIVAN View Post
    I would get a hard quote on the SF cans before moving forward though. If you are guessing at the prices based on MSRP you might be surprised when you get an actual price.
    Surprised 'happy' or surprised 'sad'? I've the Surefire shown on dealer websites in the $1000-1200 range.

    I'll look more closely at the M4-1000. It was longer and heavier than I like, at least per the specs I got off the AAC website (I haven't looked closely at the 2008 catalog yet). But maybe the cost savings is worth it.

  7. #7
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    If they are showing $1200 for the 556k, that's pretty close to retail. I'd bet that you could hunt a better price for those.

    Check three places:

    G&R Tactical
    Polite Society Inc
    ADCO Firearms

    The M4-1000 should be no heavier than 19oz, and it's now using the same technology and materials as what they used when it was called the 2006 M4-2000.

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    I figured the Surefires were close to $1k, I just have to decide if they are worth it over some of the others, especially the M4-1000.

    Are there any performance differences between the Surefire K model and the AR model? I like the additional overlap of the AR model.

    ETA: I forgot to ask how significant the difference in sound signature between the SCAR-SD and 416-SD models are relative to the M4-1k and M4-2k models.

    The 2008 AAC catalog lists the reduction as follows (no mention of wet vs dry):

    M4-1000 30dB
    M4-2000 36dB
    416-SD 36dB (this is a big difference from last year)
    SCAR-SD 28dB

    Please note: I know there is a lot of controversy about comparing dB ratings between different manufacturers, and I don't want to try to do that here. I'm trying to compare and contrast the performance of AAC models only, using the AAC specs, and hear the impressions from users that have shot them side by side.

  9. #9
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    All the AAC numbers should be DRY. Running wet is an exception to the norm (in my opinion) for a 5.56 can.

    Keep in mind that those 08 cans are realistically at LEAST 9 months from being in your hands. Maybe even longer.
    "You people have too much time on your hands." - scottryan

  10. #10
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    Quote Originally Posted by GlockWRX View Post
    M4-1000 30dB
    M4-2000 36dB
    416-SD 36dB (this is a big difference from last year)
    SCAR-SD 28dB
    The M4-1000 numbers look low, but I can't get in to John Titsworth's site to confirm what he metered it at.

    Anyhow the 416-SD is apparently the same can as the M4-2000 for this model year.

    In the past the 416-SD was a shorty can, like the SCAR-SD.

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