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Thread: Testing Gas Rings

  1. #11
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    Quote Originally Posted by Ned Christiansen View Post
    My new enhanced bolt will soon be on the market, it uses SIX gas rings and has little teeny weeny knock pins just like a car's piston to make sure the gaps never line up
    I thought we already dispelled that old wives tale about not letting gas rings line up...

    Is it necessary to engineer a product to fix a non problem?
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  2. #12
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    Quote Originally Posted by Iraqgunz View Post

    The method you describe is taught by Ken Elmore and others and is also the accepted way. It's the way I did it as well.
    It is also the method that I was taught during the armorer's course at Schofield Barracks in 2006.

  3. #13
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    Quote Originally Posted by sgtjosh View Post
    I thought we already dispelled that old wives tale about not letting gas rings line up...

    Is it necessary to engineer a product to fix a non problem?
    ========================================

    Ned, you've got a nibble...set the hook, set the hook!!



    Just jacking with you SgtJosh.

    .
    Last edited by ucrt; 12-03-11 at 01:19.

  4. #14
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    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.



    Owner/Instructor at Semper Paratus Arms

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  5. #15
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    Gunz, I poo-poohed them until you told me you used them on the fleet. I figure if you say they're good, they're good.

    If and when we conclude this thread, we ought to have one on how some guns seem to eat gas rings. Have not experienced it myself but some guys assume bad rings, I think more likely rough carrier bores-- and if it's rough, and chromed like it oughtta be, it's gonna be a long time before it stops eating them. Any thoughts, experiences, scientific testing / surface finish readings guys?

  6. #16
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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.
    While the gun never failed to operate correctly, the 3 sets of McFarland rings I used never made it past 1k rounds before failing the bolt/gravity test. Theyre still on bolts around here somewhere, but not in any of my guns since I havent had any issues with standard rings in a long time.

  7. #17
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    Ned,

    In my experience they worked fine. I finally cleaned my SBR last night and checked my rings last night and they were good.

    I have not had any issues with any of the ones I have used and the ones we had in Iraq were good as well.

    I agree that it stands to reason if the inside of the carrier is shoddy then it would accelerate the wear. The same goes for not keeping your weapon lubed.

    Quote Originally Posted by Ned Christiansen View Post
    Gunz, I poo-poohed them until you told me you used them on the fleet. I figure if you say they're good, they're good.

    If and when we conclude this thread, we ought to have one on how some guns seem to eat gas rings. Have not experienced it myself but some guys assume bad rings, I think more likely rough carrier bores-- and if it's rough, and chromed like it oughtta be, it's gonna be a long time before it stops eating them. Any thoughts, experiences, scientific testing / surface finish readings guys?



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  8. #18
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    Thanks all. The BCG is a hard chrome from Young's. I don't see anything inside that would prematurely cause the rings to fail. And it isn't like the bolt collapses slowly or a little bit. It drops like a rock. I tried it again this morning after removing all lube. It still falls like there are no rings.

    I guess the next test will be to see if the new rings wear out in another 500 rounds.

  9. #19
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    Quote Originally Posted by El Cid View Post
    Thanks all. The BCG is a hard chrome from Young's. I don't see anything inside that would prematurely cause the rings to fail. And it isn't like the bolt collapses slowly or a little bit. It drops like a rock. I tried it again this morning after removing all lube. It still falls like there are no rings.

    I guess the next test will be to see if the new rings wear out in another 500 rounds.
    =====================================

    Could possibly be that inside the BCG is too large?
    Do you have another Bolt you could try to see if you get the same results with the test? If another Bolt drops the same,...
    ...there aren't too many things it can be, I'd guess it woud point to the BC:
    - inside dimensions out of spec
    - inside finish oos

    But maybe it's just me...

    .
    Last edited by ucrt; 12-03-11 at 10:52.

  10. #20
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    Quote Originally Posted by ucrt View Post
    =====================================

    Could possibly be that inside the BCG is too large?
    Do you have another Bolt you could try to see if you get the same results with the test? If another Bolt drops the same,...
    ...there aren't too many things it can be, I'd guess it woud point to the BC:
    - inside dimensions out of spec
    - inside finish oos

    But maybe it's just me...

    .
    That's a great idea. I'll give that a go later today.

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