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Thread: Testing Gas Rings

  1. #41
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    Quote Originally Posted by Iraqgunz View Post
    I use one piece rings (McFarlands) and never worry. And before anyone poo-poos their performance my 11.5" has over 7500 rounds through it with those rings and they are still going strong.

    Sorry to dig up a semi-old topic, but I actually used the search button.

    My gas rings on my BCG seem a little 'loose' but they still pass the gravity test. I believe I have over 3,000 rounds on my AR, but probably not more than 4,000. I think I am going to go ahead and order the one piece McFarland rings on your recommendation.
    http://www.youtube.com/wormydog1724

    Quote Originally Posted by Iraqgunz
    This isn't "Ihuntcoyotes.com.

  2. #42
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    They can be had for as little as $1.25 if you want to try them out.

  3. #43
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    As an update, I did install a McFarland ring. Put 40 rounds through it and everything works fine. I'm expecting to put 800+ through it in a week or so.

    FWIW I bought a few of the McFarland rings and don't see a reason to use anything else in the future.

  4. #44
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    I wonder why there are some recent reviews on Brownells about the rings being undersized and causing gas blow by?

    http://www.brownells.com/.aspx/sid=4...001257_d_11097

    I like the idea but has anyone here had that problem?
    Last edited by Waylander; 01-16-12 at 10:41.

  5. #45
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    gas flow

    Supersonic flow chokes(stops its flow rate at Mach1) when constricted. So it gets choked after passing a single rings available flow area. The next rings having the same approximate flow areas would not further restrict mass flow to much appreciable differences because it was already incredibly reduced at the nozzle(gap) of the first ring.

    The tail of the bolt doesn't have a ring, so the tail is really really tight tolerance(.0002), it would have been nice to ring it but you see the issues. So this being small or large, and the carrier inside diameter where this fits could be small or large, this would make more of a gas energy change than any ring issue. I run my rings for a really long time without problems, every time I have replaced them for a problem there was another culprit.

    If you're having potential ring issues you are weak somewhere else and monkeying with the rings may make it good or not. Gas key is a bastard sometimes because it seems tight and all but take it off and cleaning up and re-tightening can fix sometimes.

    I don't see how anyone can not use the ejection pattern for troubleshooting. The ejector spring and ejector are one of the most statistically unvarying elements in an AR. I have shortened the ejector springs on a weapon to see how much the ejection changed and it wasn't much, at all, small spring and low mass of the ejector makes a stable operation compared to all the other variables in the AR. Ejection pattern gives you an instant analysis if the gun is going to take a shit. Undergassed, overbuffed,oversprung, or shitty ammo it doesn't matter, what matters is it is about to shit. If you've just lubed your weapon, everything is good, and it is ejecting completely rearward at 6 o'clock, you should examine a few things. That is the point of the ejection pattern study, not what the actual diagnosis is. All kinds of things can be the problem but the status of the weapon in its current operation is the real issue. I have shot tons of video showing ejection pattern relations and what it can lead to that I should put together. I think the people who don't like the chart just don't like the conclusions that are related to the locations.

  6. #46
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    Quote Originally Posted by sqwerl View Post
    I wonder why there are some recent reviews on Brownells about the rings being undersized and causing gas blow by?

    http://www.brownells.com/.aspx/sid=4...001257_d_11097

    I like the idea but has anyone here had that problem?
    Yes. I just did a thorough cleaning of my BCM BCG, and decided to change rings. I had a Mcfarland ring so I installed it. It would not pass any of a couple different types of ring tests. Put regular rings in it, it passed no problem. Maybe that's the way they normally behave, but I decided not to use it.
    "Guns are like neurosurgeons. When you need one, you need one badly."

  7. #47
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    When I started the install and replacement of our gas rings in late 2007 early 2008 I believe we purchased all of ours from Brownells.

    I have never had any failures with them and I use them on my personal uppers w/o issue at all.

    Quote Originally Posted by sqwerl View Post
    I wonder why there are some recent reviews on Brownells about the rings being undersized and causing gas blow by?

    http://www.brownells.com/.aspx/sid=4...001257_d_11097

    I like the idea but has anyone here had that problem?



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  8. #48
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    Quote Originally Posted by sqwerl View Post
    I wonder why there are some recent reviews on Brownells about the rings being undersized and causing gas blow by?

    http://www.brownells.com/.aspx/sid=4...001257_d_11097

    I like the idea but has anyone here had that problem?
    Yes. I've taken a chance with McFarland rings from Brownells on two separate occasions. Both times the rings received were undersize. Fortunately, Brownells' customer service was legendary and returning them was no biggie.

    I'd recommend anyone to try McFarland rings. You might even add a couple to your next Brownells order, but be forewarned. Brownells has a track record of shipping out of spec McFarland rings. Doesn't mean the concept is flawed, just that Brownells of all companies is sitting on a big inventory of rings that should have been scrapped.
    Oh no, not another lube thread! Read this first: Lubrication 101.

  9. #49
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    I ordered mine from DSG Arms. It was initially so tight I was worried until I started hand cycling the crap out of it.

  10. #50
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    Quote Originally Posted by Iraqgunz View Post
    When I started the install and replacement of our gas rings in late 2007 early 2008 I believe we purchased all of ours from Brownells.

    I have never had any failures with them and I use them on my personal uppers w/o issue at all.
    So IG, would these pass a gas ring test? Or are they loose and you use them with no problems anyway?
    "Guns are like neurosurgeons. When you need one, you need one badly."

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