Originally Posted by Crunchmeister
If you're talking about a gas gun, then it's required if you're using propane as a propellant. You put a couple of drops in the nozzle of your propane bottle every 8-10 mags you shoot. It will keep your rubber seals lubricated and prevent them from drying out.
And quite honestly, silicone oil is by far the cheapest thing you will buy in airsoft.
yep thats what happened to me