Originally Posted by
bp7178
I have a question regarding the mounting of the NSR in relation to the upper.
How does the alignment between the NSR and the upper's rail happen? Is it a function of the timing of the NSR's barrel nut? Is there a slight fine tuning that can happen when attaching the body of the rail to the barrel nut?
I'm kind of demanding that the upper's rail be in perfect alignment with the rail. I have built quite a few uppers, and the only two that really lined up perfectly where a DD RIS-II and a Vltor MUR. So I would expect there may be a slight difference in overal dimensions of the rail. I would expect this difference to be equal on both sides of the receiver with no detectable cant.
That being said, I was considering buying a NSR equipped upper from Noveske. It's my understanding if/when Noveske installs them, they add an anti-rotation pin. I would assume this pin sets the relationship of the rail to the upper. For those that have handled one, was there any cant, however slight?
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