i run an oiled patch down the bore, and over the bolt, bottom side of carrier, in the reciever grooves in carrier, face of hammer, over the oprod, oprod and recoil springs with cheap outers oil. a thin film is all you need to protect the rifle. now most people say dont oil the gas system, but mine will rust within a day if I leave it dry, so I started putting a light coat of ballistol klever in the gas tube and on the piston. Ballistol is thin enough that it burns out of the gas system when shooting so it doesnt collect powder residue and bake on, but it keeps the gas system from rusting. running it without oil will wear parts faster, ultimately wearing out the rifle faster. I dont mind stripping and cleaning my guns after shooting so its not a problem for me.