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Thread: barrel length, gas system, dwell time, accuracy

  1. #11
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    Quote Originally Posted by Winnerkd View Post
    I was always under the impression that the benefits of a midlength were:

    Less pressure put on the BCG, allowing a longer service life
    Less violent extraction
    Less felt recoil



    ditto: +1 me too.


    rifle gas is even better.
    i started this life with nothing.....kept most of it.

  2. #12
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    Quote Originally Posted by Winnerkd View Post
    I was always under the impression that the benefits of a midlength were:

    Less pressure put on the BCG, allowing a longer service life
    Less violent extraction
    Less felt recoil
    Rifle length gas system does that but more so than the intermediate system.
    The rifle length gas system and rifle length buffer system makes for the softest cycling system. [The way it was originally designed]
    Last edited by Thomas M-4; 05-28-10 at 18:14.

  3. #13
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    Quote Originally Posted by Thomas M-4 View Post
    Rifle length gas system does that but more so than the intermediate system.
    The rifle length gas system and rifle length buffer system is the makes for softest cycling. [The way it was originally designed]
    This is why I don't understand the carbine length gas system on the LMT.

  4. #14
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    Quote Originally Posted by Winnerkd View Post
    This is why I don't understand the carbine length gas system on the LMT.
    On the 5.56 MRP I think they have 2 different gas system lengths carbine and mid length if I remember correctly. The .308 MRP use of a carbine gas system I don't know for fact but I imagine that LMT has there Bolt carrier correctly ported and timed for use in the carbine gas system.
    Last edited by Thomas M-4; 05-28-10 at 18:22.

  5. #15
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    Quote Originally Posted by Thomas M-4 View Post
    On the 5.56 MRP I think they have 2 different gas system lengths carbine and mid length if I remember correctly. The .308 MRP use of a carbine gas system I don't know for fact but I imagine that LMT has there Bolt carrier correctly ported and timed for use in the carbine gas system.
    I have their .308, and I think the gas system is the one thing I don't like about it, the rest is golden.

  6. #16
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    So a 14.5" with mid gas should really begin to bring the recoil down more towards the 20" barrel then?

  7. #17
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    Quote Originally Posted by FrankRochester View Post
    So a 14.5" with mid gas should really begin to bring the recoil down more towards the 20" barrel then?
    No, it's milder than a carbine but is still 5.5 inches shorter than the rifle. Lot's more felt blast. Recoil on any is not an issue. It's muzzle rise and blast that effects your shooting with an 5.56 AR system.
    "The peace we have within us is most often expressed in how we treat others"

  8. #18
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    Quote Originally Posted by Sundo View Post
    Are my concerns above valid


    No, I don't believe they are.

    What setup are you currently using, and what size groups are you getting?
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


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  9. #19
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    I don't mean to hijack the thread, but one quick question:

    Are there any advantages of using a midlength gas system in an 18" barrel compared to using the new intermediate gas system?
    Formerly known as "Son of Vlad Tepes"

  10. #20
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    Quote Originally Posted by Son of Vlad Tepes View Post
    I don't mean to hijack the thread, but one quick question:

    Are there any advantages of using a midlength gas system in an 18" barrel compared to using the new intermediate gas system?
    i dont think so. the intermediate system seems to be the proper ratio of between 60-65%. it's an improvement over both previous options.

    it's an indicator, not a rule:

    14.5 carbine - 52%
    14.5 mid - 65%
    16.1 carbine -47%
    16.1 mid - 59%
    18 mid - 53%
    18 intermediate - 64%
    18 rifle - 69%
    20 rifle - 63%
    Last edited by bkb0000; 05-29-10 at 22:09.

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