Found this Forum while going thru some you tube vid's on Ruger AR 556, Due to the fact I just purchased one several weeks ago. Some one was having issues with an AR 556 right out of the box. I was set back at how many members of this forum answered. I will give my AR a good cleaning and lube before I hit the desert. I live southeast Arizona in San Tan Valley. I also own Rem 870 tactical express, SKS, Glock G23 and my wife has a Charter arms undercover 38 special, And of course my new member to my gun family Ruger AR556.