Quick release vs permanent simply implies that you can quickly remove the scope off (and put it back on) the base using your fingers with quick release rings, while you would need a torque bit, like Nyksta mentioned, to attach the “permanent” ones. They aren’t really permanent, they are just regular rings and the name distinguishes them from the quick-quick release of the same model, really.
I have two sets of PRW2 and they seem to work pretty great, no complaints yet. I have never taken a scope out of them yet though.
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