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Thread: New to pistol ARs

  1. #11
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    Quote Originally Posted by opngrnd View Post
    I think 11.5 is a sweet spot for many.
    Agreed. Little more dwell time and a couple extra fps.

  2. #12
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    While certainly not technical feedback, this is the wrong time to be spending $$$ on an AR pistol. To be truthful not even 16" AR's are likely to be safe, but "pistols" are low-hanging fruit and easily picked. YMMV.

    To render more technically-related info? As others have said, going below 10.5" is not desirable or optimal, both for ballistics and function.
    11C2P '83-'87
    Airborne Infantry

  3. #13
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    I would posit they're ALL in some danger at this point.

  4. #14
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    Quote Originally Posted by ABNAK View Post
    While certainly not technical feedback, this is the wrong time to be spending $$$ on an AR pistol. To be truthful not even 16" AR's are likely to be safe, but "pistols" are low-hanging fruit and easily picked. YMMV..
    What does this mean?
    Big brother is watching...and listening.

  5. #15
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    While certainly not technical feedback, this is the wrong time to be spending $$$ on an AR pistol. To be truthful not even 16" AR's are likely to be safe, but "pistols" are low-hanging fruit and easily picked.
    Biden has said he'll make all semi-automatic rifles Class III weapons.

    HE doesn't understand what he's talking about, but his handlers do...
    "I am a Soldier. I fight where I'm told and I win where I fight." GEN George S. Patton, Jr.

  6. #16
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    ^^Agreed^^

  7. #17
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    Quote Originally Posted by AndyLate View Post
    From the link above: "LOUD. Even with ballistic shooting glasses, the concussion hurts my eyes."

    That pretty much sums up the disadvantage of a 7.5" 5.56/.223.

    Andy
    I heard being loud a lot before I got my DDM4 10.3" AR Pistol.

    It has proven to be a myth. If louder than 16" barrel I can't tell and zero concussion....

  8. #18
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    Quote Originally Posted by Whalstib View Post
    I heard being loud a lot before I got my DDM4 10.3" AR Pistol.

    It has proven to be a myth. If louder than 16" barrel I can't tell and zero concussion....
    Your experience is different than mine. Neither your experience or mine proves or disproves anything. I cannot tell a real difference between a 16" or 14.5" AR, but my 11.3" has noticeably more concussion.

    This article also disagrees with you: http://www.sadefensejournal.com/wp/b...-nato-weapons/

    If you have quantifiable proof that the sound level or muzzle pressure is the same with a 10.3" and 16" 5.56, feel free to share the data.

    I could also point out the OP and my post are referencing 7.5" barrels.

    Andy
    Last edited by AndyLate; 01-14-21 at 19:36.

  9. #19
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    Quote Originally Posted by AndyLate View Post
    Your experience is different than mine. I cannot tell a real difference between a 16" or 14.5" AR, but my 11.3" has noticeably more concussion. This article also disagrees with you: http://www.sadefensejournal.com/wp/b...-nato-weapons/
    Actually it says...

    "Actual sound pressure levels varied from 162.5 dB(A) in the 24-inch barrel to 165.1 dB(A) in the 5-inch barrel." Almost reads like a misprint as I'd have guessed a much greater difference from a 24" to a 5"! 16" to 10" I seriously can not tell the 10" is much louder


    Plus the article is dealing with effects on suppressors....Maybe it correlates to unsuppressed.....

    Anyways....As I said it's not a very discernible difference and no reason to avoid a shorter barrel. Other factors would be more important IMO.

    Cool article! Thanks!

  10. #20
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    Quote Originally Posted by Whalstib View Post
    Actually it says...

    "Actual sound pressure levels varied from 162.5 dB(A) in the 24-inch barrel to 165.1 dB(A) in the 5-inch barrel." Almost reads like a misprint as I'd have guessed a much greater difference from a 24" to a 5"! 16" to 10" I seriously can not tell the 10" is much louder


    Plus the article is dealing with effects on suppressors....Maybe it correlates to unsuppressed.....

    Anyways....As I said it's not a very discernible difference and no reason to avoid a shorter barrel. Other factors would be more important IMO.

    Cool article! Thanks!
    I'm not questioning whether you notice a difference. A 10.3" barrel using the same muzzle device and ammunition as a 16" barrel will be measurably louder. I, like most people on the planet, can detect a difference as well.

    FYI - there is a significant difference between 162.5 and 165.1dB, certainly detectable by most people. 2.5 dB is roughly a 25% increase in perceived loudness. Also from the article "the sound measurements are not considered overly accurate due to compliance with the Mil-Std."

    To be clear, the quote I found amusing and provided was, like the OP, referencing a 7.5" 5.56 barrel.

    Andy

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