Originally Posted by SNK
That won't help at all with the primary o-ring that is inside the mag that will dry out eventually. Silicone oil will only lube the valves.
Keep some gas in your mag, just enough to keep pressure on your primary o-ring in the bottom of the mag.
False, it does help with all the o-rings inside. A properly oil mag will keep all seals lubed. Including the "primary" which I'm asuming your calling the one which seals the typical mag 1/2's together.