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Thread: Reasonable smallest OD to contour a barrel

  1. #1
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    Reasonable smallest OD to contour a barrel

    I am about to undergo a "featherweight" project of my own, courtesy of my wife. She went shooting a carbine with me today for the first time () and expressed that a) she wants to have one rifle that's hers b) everything I have is too heavy. I want her to succeed, and I am going to sent one my uppers (16" standard BCM middy) for contouring and shortening.

    The question I have for all resident experts is what would be a reasonably lightest contour - both under handguard and forward of FSB - that would not overheat excessively and maintain decent accuracy and rigidity.

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    I think .625 is pretty much the thinnest you will find readily available so it's probably a hint that it's as thin as you should go. I went w/ a .625 barrel mated w/ a cavarms lower and I swear it's lighter than my M&P 15-22. Unbelievably light. Almost toy-like.
    "We prepare, so we don't end up at the superdome"- unknown

    "IMHO, if you wanted to shoot crap ammo, you should have bought a crap upper. It makes baby Jesus cry when he sees crap ammo put through a nice upper."- C4IGrant

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    MacDonald's straws are NOT AR barrels.

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    It is legal to hunt, kill, and eat porcupines, armadillos and badgers in Texas.

  6. #6
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    Cool. Looks like .550-.565 is the lightest people go for .223. I believe I read somewhere KAC's is .575. I'll probably go with 0.600.

  7. #7
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    Tell your wife to work out...
    Mobocracy is alive and well in America.*
    *Supporting Evidence for Hypothesis: The Internet
    -me

    'All of my firearms have 4 military features, a barrel, a trigger, a hammer, and a stock."
    -coworker

  8. #8
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    Quote Originally Posted by Mac5.56 View Post
    Tell your wife to work out...
    You tell her. Done that before, for other reasons. I have no argument. She has four shelves worth of sports trophies to exactly zero of mine and ranked #1 at her level in Intermountain district. She gets bored in gym. She doesn't want muscular-looking arms, and, as you know, once looks and appearance are brought in, you have no chance...

  9. #9
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    If I ever get another AR10, I'll take the barrel down to featherweight.
    "Life is short, but the years are long." - Robert A. Heinlein

  10. #10
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    Quote Originally Posted by armakraut View Post
    If I ever get another AR10, I'll take the barrel down to featherweight.
    Will featherweight handle a pressure of .308 load?

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