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Thread: McFarland Gas Ring vs. Standard

  1. #71
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    Quote Originally Posted by kartoffel View Post
    So, any reliable sources of MacFarland rings?

    I took a chance with Brownell's, even after reading of the problem a couple months before placing my order. I (wrongly) assumed they would have fixed the problem.

    Lo and behold, they sent me undersized rings. I returned them with a letter explaining WHY they were unacceptable, and HOW to measure their existing inventory of rings to cull the rejects.

    It's been about a year since then. Maybe I'll order another couple rings from Brownell's just to see if they've taken any remedial actions.
    Has best as I can tell .503" seems to be the correct size. The ones that were reporting undersized were under the .503" mark. I don't think that all of the brownell gas-rings are undersized but it seems that they got a bad shipment at some point. Picked up mine from Grant.

  2. #72
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    I have been using McFarland rings from Grant for several years now.

    I have had ZERO issues with his and consider them a HUGE plus. My old BCM 16" middy had issues running 55gr tula .223 using new gas rings. The gun, otherwise, ran perfectly. Upon switching to MF rings from Grant, the issue disappeared and the gun just ate everything I put in it.

    I've found that with the prevalence of heavier buffers (H, H2, H3, A5, etc) and more attention being paid to the strength of the buffer/action spring, the 'increased friction' of the rings is easily overcome by the strength of the action spring and the inertia of the BCG/Buffer.

    My 14.5" BCM middy is nearly 2K rds deep with zero issues on my MF ring....and no wear is detectable.

    I see no downside.

    I had bad luck with MF rings from Brownells (same issues described above). Every ring I got from Grant has been perfect. Now all my buddies run MF rings from Grant and their rifles are so far, literally perfect in reliability. Prolly 6k rds between my rifle and all of theirs so far (and climbing).

    I will keep using them with complete confidence. If you buy from Grant, you won't have any issues at all.

  3. #73
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    I guess I've just been lucky. No problems with ANY rings so far. Thank God, knock on wood, etc... Maybe I need to shoot more... What a great excuse! Research!

  4. #74
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    I've watched the head armorer for Navy Small arms at Crane toss them aside while working on match guns while on the van at Perry, Interservice and the Navy Matches. If he does that with them I'd say a no go for me.

    Dan

  5. #75
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    Quote Originally Posted by agr1279 View Post
    I've watched the head armorer for Navy Small arms at Crane toss them aside while working on match guns while on the van at Perry, Interservice and the Navy Matches. If he does that with them I'd say a no go for me.

    Dan
    Institutional inertia.

    It doesn't necessarily mean anything. I bet he still keeps his guns white-glove clean.

    That's so 10 years ago!!!

    Seriously...he may have his specific reasons (or feelings) for doing so...I won't try and speculate why he does that. There are simply too many people running quality AR's (and heavy buffers) that are running 100% for there to be an issue with the rings alone. I still think it's a tolerance stack between the combo of a carbine buffer and weak buffer spring to prevent the BCG from returning to battery properly. My gun does it even when bone dry. That's just my observation so far....

  6. #76
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    I know guys in the military that still clean their M16's with white gloves and strip the weapon down and clean them so much that they remove the finish.

    All that means is that they still haven't gotten it. Also, since I have worked directly with Navy weapons personnel I can tell you first hand they are the most inflexible personnel I have met due to Navy regulations.

    Quote Originally Posted by agr1279 View Post
    I've watched the head armorer for Navy Small arms at Crane toss them aside while working on match guns while on the van at Perry, Interservice and the Navy Matches. If he does that with them I'd say a no go for me.

    Dan



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  7. #77
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    Quote Originally Posted by Iraqgunz View Post
    I know guys in the military that still clean their M16's with white gloves and strip the weapon down and clean them so much that they remove the finish.

    All that means is that they still haven't gotten it. Also, since I have worked directly with Navy weapons personnel I can tell you first hand they are the most inflexible personnel I have met due to Navy regulations.
    They were in my First NM gun from Armalite. Never had an issue with that one. I have seen McFarland rings fail on the range. While the principle works great they seem to be having an issue right now. We all know rings seal the area to allow gas pressure to build to cycle the bolt. If they work so well why do engine manufacturers still use several one piece rings when building engines. The guy I know Devgru goes to so I think he knows what he talks about and I'm sure there are a few on here who know him too.

    Dan

  8. #78
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    Like I said. I outfitted about 200 of them in Bushmaster carbines and they worked great. I use them in my personal carbines and they work fine as well.

    Quote Originally Posted by agr1279 View Post
    They were in my First NM gun from Armalite. Never had an issue with that one. I have seen McFarland rings fail on the range. While the principle works great they seem to be having an issue right now. We all know rings seal the area to allow gas pressure to build to cycle the bolt. If they work so well why do engine manufacturers still use several one piece rings when building engines. The guy I know Devgru goes to so I think he knows what he talks about and I'm sure there are a few on here who know him too.

    Dan



    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

  9. #79
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    Ok. Agree to disagree on this one.

    Dan

  10. #80
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    agr1279, I'm interested...what failure did you witness with these rings. I've only seen one years ago(standard rings), and they were beyond worn out.

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