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Thread: M27 on Tac-TV last night!

  1. #101
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    This debate does seem familiar . My conclusion about the SAW vs M27 is the same as the conclusion reached at the end of this video.


    http://www.youtube.com/watch?v=5G4T7kN0t68

  2. #102
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    Hey R0N if American CHF barrels only showed to be good for 10,000 rounds what kind of life are ya'll getting out of the standard button rifled M4 and M16 barrels?
    Quote Originally Posted by C4IGrant View Post
    Colt builds War Horses, not show ponies.
    Quote Originally Posted by Iraqgunz View Post
    This is 2012. The world is going to end this December and people are still trying to debate the merits of piece of shit, cost cutting crap AR's. Really?

  3. #103
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    Quote Originally Posted by sinlessorrow View Post
    Hey R0N if American CHF barrels only showed to be good for 10,000 rounds what kind of life are ya'll getting out of the standard button rifled M4 and M16 barrels?
    approx. 5000 rounds.

  4. #104
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    Quote Originally Posted by sinlessorrow View Post
    Hey R0N if American CHF barrels only showed to be good for 10,000 rounds what kind of life are ya'll getting out of the standard button rifled M4 and M16 barrels?
    The biggest question is what is the definition of "life", and measured by what convention?
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  5. #105
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    Quote Originally Posted by Failure2Stop View Post
    The biggest question is what is the definition of "life", and measured by what convention?
    I don't know what the Marines used to determine but I would guess an accuracy criteria at a certain distance.

    Alot of barrels will shoot 10,000+, just look at filthy 14. Accuracy though will suffer. Then theres also throat life and gas port.
    Last edited by sinlessorrow; 03-18-13 at 08:30.
    Quote Originally Posted by C4IGrant View Post
    Colt builds War Horses, not show ponies.
    Quote Originally Posted by Iraqgunz View Post
    This is 2012. The world is going to end this December and people are still trying to debate the merits of piece of shit, cost cutting crap AR's. Really?

  6. #106
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    Quote Originally Posted by sinlessorrow View Post
    I don't know what the Marines used to determine but I would guess an accuracy criteria at a certain distance.

    Alot of barrels will shoot 10,000+, just look at filthy 14. Accuracy though will suffer. Then theres also throat life and gas port.
    ROF plays a big role in barrel life
    *** Damn Proud to Be an American Ally ! ***

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  7. #107
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    Quote Originally Posted by Frens View Post
    ROF plays a big role in barrel life
    That is true. I can only imagine what kind of barrel life the Army is now getting with the use of M855A1.

    Has the M27 been tested on M855A1 to see how it performs with it?
    Quote Originally Posted by C4IGrant View Post
    Colt builds War Horses, not show ponies.
    Quote Originally Posted by Iraqgunz View Post
    This is 2012. The world is going to end this December and people are still trying to debate the merits of piece of shit, cost cutting crap AR's. Really?

  8. #108
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    Quote Originally Posted by sinlessorrow View Post
    I don't know what the Marines used to determine but I would guess an accuracy criteria at a certain distance.

    Alot of barrels will shoot 10,000+, just look at filthy 14. Accuracy though will suffer. Then theres also throat life and gas port.
    That's my point.
    The usual criteria for the USMC is the throat gauge, which is a highly flawed method. I've seen barrels with less than 1,000 rounds through them fail the throat gauge that still shot sub 3 MOA.

    I've also seen barrels with well over 5k that failed throat gauge that maintained adequate precision.

    I personally would prefer to see throat gauging get changed to a more accurate measurement technique, and to be disassociated as a pass/fail criteria and instead insert a live-fire precision requirement.

    I think that the only gauges that should be a pass/fail should be barrel straightness, firing pin protrusion, and headspace.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  9. #109
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    Quote Originally Posted by Failure2Stop View Post
    That's my point.
    The usual criteria for the USMC is the throat gauge, which is a highly flawed method. I've seen barrels with less than 1,000 rounds through them fail the throat gauge that still shot sub 3 MOA.

    I've also seen barrels with well over 5k that failed throat gauge that maintained adequate precision.

    I personally would prefer to see throat gauging get changed to a more accurate measurement technique, and to be disassociated as a pass/fail criteria and instead insert a live-fire precision requirement.

    I think that the only gauges that should be a pass/fail should be barrel straightness, firing pin protrusion, and headspace.
    Isn't that test done to keep the chances of case seperations to a minimum since enlarged throats is a cause of it?

    It is still very interesting to see that the HK barrel gets about 4x the life in that area.
    Last edited by sinlessorrow; 03-18-13 at 10:15.
    Quote Originally Posted by C4IGrant View Post
    Colt builds War Horses, not show ponies.
    Quote Originally Posted by Iraqgunz View Post
    This is 2012. The world is going to end this December and people are still trying to debate the merits of piece of shit, cost cutting crap AR's. Really?

  10. #110
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    Quote Originally Posted by sinlessorrow View Post
    Isn't that test done to keep the chances of case seperations to a minimum since enlarged throats is a cause of it?
    No.
    The throat measurement is a depth measurement, not an internal diameter measurement.
    So, while measuring the throat wear would be a measure to attempt to reduce case throat tears, the current gauging does not take that into account.

    ETA: the gauge used is very similar to this one:
    http://www.brownells.com/gunsmith-to...-prod8761.aspx
    EXCEPT that it measures from the rear of the upper receiver instead of at the barrel extension/bore.
    There are several way that the gauging done could be more accurate.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

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