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Posted: 6/9/2007 1:54:59 PM EDT
| I have heard that Rock River Arms' AR15 buttstock tube has different threads than other brands is this true? What is the difference really between them and others? I dont mean opinion wise I mean parts wise. |
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The threads are universal. The way the threads are formed is not. Commercial threaded tubes (like RRA) cut the threads into the tube. This results in a tube that needs a larger OD than Mil-spec tubes. Mil-Spec tubes roll the threads into the tube. (hence the smaller OD) |
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