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Looking to buy a roller cam pin for my Sig 516. Anybody know who has one in stock? POF is out of them.
FYI... If you look closely at the inside of your receiver on your SIG516 you will see there is a very slight angled cut where there would usually be cam pin wear. SIG engineers designed this to minimize cam pin gouging
in order to avoid the incessant customer service calls from consumers more concerned about "fit and finish" about normal functional wear of the operating system that stops once adequately "worn in" and does not have any effect on the functioning of the weapon.
Fixed it for you.
That being said - increased cam pin wear is a side-effect of external piston driven operation in the AR - a system designed with an internal piston which initiates the unlocking cycle.
~Augee
Mi DI gun has the same wear as my two piston guns. The roller cam I have in one of them may slightly redice this but not so much that I am going to buy another one for the rifle that doesn't have one..
To clarify - I am talking about cam pin stress, rather than visible wear.
Not that it makes a huge difference, I wouldn't be terribly concerned about either - but part of the function of the DI system is to work as an internal piston, while a piston system like we're talking about here simply uses rearward force on the carrier.
Again - is this practical or not? Who knows, but there is more stress, and therefore "wear" (as in "wear and tear") on a piston cam pin. Visible wear in the upper receiver may be identical, and identically irrelevant.
~Augee