Stoner AR Operating System Technical Detail
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Quote:
Originally Posted by
tvfreakarms
What is it about the roller cam pins that don't really serve a purpose vs regular cam pins?
2 by 2...hands of blue
As far as I understand it, those rollers are supposed to prevent damage to the upper from the cam pin. I don't think they have any other purpose. And as we now know, those forged uppers last a very, very long time. So if the rollers are a liability, then it's really not worth having them.
What may be worth while, however, are the cam pins that are round instead of square. They don't have rollers; they're just round. I don't know if they would be any better than the square ones, but they might be worth looking into. They may reduce wear on the upper without sacrificing anything. I have no idea, I'm just saying that it's worth seeing where it goes. My gut tells me they're okay but probably don't offer much advantage over the square ones.