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This is a discussion on New AR556 question within the Ruger Semi-Auto forums, part of the Rifle & Shotgun Forum category; The problem is not the castle nut, it is the fact that they machined down the boss on the lower to much. Even more of ...


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Old March 14th, 2017, 11:12 AM   #16
 
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The problem is not the castle nut, it is the fact that they machined down the boss on the lower to much. Even more of a concern is that If you aren't careful and remember to really lift up on the charging handle, it hits the stock and rips the handle out of your fingers (painful). I have compared this to six other AR 15 lowers. I can put the Ruger upper on other lowers and there is no contact, put any other upper on the Ruger lower and they will all hit the castle nut and stock. I sent the photos to Ruger and without hesitation they wanted the firearm back. They received the firearm on Monday, so now I wait.

I have never been bothered by normal wear and tear, but I don't like buying a new firearm and finding machining errors. Luckily Ruger has great customer service, so I am not worried about it at all. My original question was to see if other Ruger 556's got out with this issue, I already knew it was not normal, this isn't my first AR. I should have worded the first post better. I do appreciate everyone's perspective and I'm glad to be part of this forum.

Thanks, Griff




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Old March 14th, 2017, 05:12 PM   #17
 
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Shows my AR556 castle nut with some wear on it. 1000 rounds fired.
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Old March 15th, 2017, 03:38 AM   #18
 
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Quote:
Originally Posted by jonm78 View Post
Shows my AR556 castle nut with some wear on it. 1000 rounds fired.
That looks pretty normal to me, mine was actually shined up and forming a flat spot after very little use (80 rounds).
Thank you for sharing the photo.

Enjoy your AR, they are a lot of fun!
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Old April 5th, 2017, 01:42 PM   #19
 
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Well it took a month but I finally got my AR 556 back from Ruger yesterday, and got to take it to the range today!

Honestly for some reason it took a while to get Ruger to understand the issue, but finally an engineer called me and agreed with my assessment of the firearm. He agreed to replace the lower receiver but let me keep my trigger (which was good for a milspec trigger) , he also agreed to let me keep my upper assembly since it cycled well. When I got the gun back lit had a new lower receiver, new buffer tube, new buffer, and new stock. And to my surprise they had also replaced the bolt carrier group; I could tell because the old one had the angular shape, this BCG is rounded like a typical AR BCG (still an Un-shrouded firing pin). This made me nervous since the old BCG worked flawlessly; but off to the range for some testing today.
Let me say, this gun runs like an absolute champ! I could not be happier!

Sorry for the long write up; now for some photos:

Charging handle no longer drags on the stock and caste nut




The new BCG


KUDOS and Thank You to Ruger for standing behind this and doing the right thing! Very very much appreciated!

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Old April 5th, 2017, 03:23 PM   #20
 
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Thanks for posting this. Being new to the AR platform myself I dont know if I would have known something was wrong if mine was doing this. I would have probabaly thought it was normal wear. I have not had a chance to get it mine to the range yet. I will have to keep and eye one it and check. How long did it take to notice?
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Old April 5th, 2017, 04:30 PM   #21
 
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Originally Posted by Beardog View Post
Thanks for posting this. Being new to the AR platform myself I dont know if I would have known something was wrong if mine was doing this. I would have probabaly thought it was normal wear. I have not had a chance to get it mine to the range yet. I will have to keep and eye one it and check. How long did it take to notice?
Mine was noticeable from the start. If I pulled the charging handle back with out the stock being fully extended, the charging handle would hit the stock and rip the charging handle out of your fingers (painful). In only 80 rounds (so not many pulls of the charging handle) the castle nut was worn flat on top and the leading edging of the stock was planed off! I have been around AR's for many years and knew the problem, luckily Ruger agreed with me and saw the need to repair the firearm.

Thanks again to Ruger and their quality support!
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Old June 14th, 2017, 09:28 AM   #22
 
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I just saw this post after posting pics of mine with the same issue. AM still waiting for the call tag, but customer service has been prompt.

Hey, it does shoot well, but it IS brand new, so what they heck? I believe it is out of spec so will be sending it back for them to make it right. Just because it is 'entry level' should not mean that we settle for less. My other AR's simply don't exhibit this. They were about $300 more each, but I have been a long-time Ruger owner and knew Bill Ruger. He would not allow this!

Just sayin'....
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Old June 14th, 2017, 10:29 AM   #23
 
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Thanks for all the posts and pictures. Mine is pretty newwith only a couple boxes through it and no polishing. There seems to be a sixteenth amount of space. There is some play up and down in the charging handle. Seems normal.
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