Since we're dragging up old threads, I'll add my own anecdotal advice. Sure, AR's might run good wet if you're using them constantly, but NEVER over lube cartridges/ chamber/receiver/magazines, and then store the rifle. It can cause a round not to fire due to oil seeping into the primer. I don't care what other "experts" might say about this, I proved it to myself years ago in several different guns. I keep most of my rifles loaded with a round chamber for my own reasons. If you clean and lube the gun, make sure you wipe out the excess .