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3/4/2011 1:48:00 PM EDT
I received the following lock ring and when I got it I noticed it said it was for a commerical buffer tube.  I won't fit on my mil spec buffer tube but I always thought the threads were the same between mil spec and commerical and the only difference was the diameter of the tube itself.  

http://www.midwayusa.com/viewProduct/default.aspx?productNumber=654034

Is the lock ring I got out of spec?  The other lock ring on my other rifle fits the buffer tube just fine.
3/4/2011 1:55:53 PM EDT
[#1]
The threads are the same.  The extension lock nut should thread onto your mil-spec extension tube.

I would return it to Midway and buy items from the vendors on this site.
3/4/2011 1:59:03 PM EDT
[#2]
I usually do order from the vendors on this site but needed to order some parts for my Remington 870.  Thanks for confirming my assumption with it being out of spec.
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