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Thread: Testing Gas Rings

  1. #71
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    That's why the stakes, to keep the cap from getting into the works. It binds up the gun like nobody's business.

    Try turning the shank of the broken screw with a fine punch first, you can also cut a groove in the top of the shank and use a screwdriver. Without the cap the shank can't be too tight.

  2. #72
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    Quote Originally Posted by Iraqgunz View Post
    The method Tweak is describing is per the TM. The other method which is often used outside of the MIL is one that came about years back.

    I'm not sure who gets credit for it.
    That bolt test came from one of the AR15 owners guides that hit the markets in the late 90's. I don't recall if it was Duff's book or another.

    I've always used the 23&P method of test the gas rings. They need to support the weight of the bolt, not the bolt carrier.

    I think some Macfarland rings are damaged on installation. The Macfarland ring is a variation of "spiral locks" used on performance pistons with floating pins.

    I have about a 50/50 mix of Macfarland rings and normal three ring bolts. I've never really had a problem with gas rings, they are a high mileage part with good lubrication.

  3. #73
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    Quote Originally Posted by madcratebuilder View Post
    That bolt test came from one of the AR15 owners guides that hit the markets in the late 90's. I don't recall if it was Duff's book or another.
    It’s been around longer than that. The first time I saw it was around 85.
    Certified Glock Armorer

  4. #74
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    Question

    Any experiences with a chromed carrier vs. non-chromed and ring life? The one non-chromed carrier I have seems to greatly accelerate the wear on the rings, fortunately that is on a beater/loaner rifle; I think the rings have lasted on average only around 1200-1500 rounds.

  5. #75
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    Quote Originally Posted by BTL BRN View Post
    Any experiences with a chromed carrier vs. non-chromed and ring life? The one non-chromed carrier I have seems to greatly accelerate the wear on the rings, fortunately that is on a beater/loaner rifle; I think the rings have lasted on average only around 1200-1500 rounds.
    This problem is with a hard chrome bolt and carrier. I'm half tempted to get a DD or LMT bolt and see if the carrier kills the rings on it. Or maybe put the hard chrome bolt in a DD carrier and see if the rings last.

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