02-01-2012, 05:33 PM
If you're running a gas piston, why worry about needing lube? It's clean there, just go ahead and lube it and forget it. I have used low friction cams, but probably I don's shoot as many rounds as others do, so my observations may not be as applicable (the rounds being divided among several AR actions, impingement and piston.) I think with the piston, I worry about the wear in the buffer tube on the bottom more, as this has been shown to be a problem in some high round firearms.