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10/23/2008 11:21:58 AM EDT
Hey guys doing my first build (seems to be common right now)

I have an  RRA lower and was wondering what diameter is for the buffer tube? Do I need a commercial or mil-spec tube.

Thanks
10/23/2008 1:53:03 PM EDT
[#1]
Tube threads and lowers are the same size, diameter of the tube is what is different.
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