At first I used CLP on my AR for everything. I used it to clean, lubricate, and protect against rust. Then I read a bunch of internet stuff that said CLP was fair at cleaning and lubricating but not the best choice.
So now I use Butch' s Bore Shine to remove copper and carbon from the barrel and I use Mobile 1 in the BCG. I use an industrial syringe to inject motor oil into the gas ports and after the first shot the oil is evenly spread into every space in the action. After a couple dozen shots the oil mixes with the carbon and turns into mud and sticks where its needed .
I don't write for Popular Mechanics so I can't tell you if motor oil is the best choice. All I can say is that it seems to be working for me. The action is slick and cleaning the BCG only requires wiping with a rag.
I still use CLP to protect against rust on the outside of my guns.
So now I use Butch' s Bore Shine to remove copper and carbon from the barrel and I use Mobile 1 in the BCG. I use an industrial syringe to inject motor oil into the gas ports and after the first shot the oil is evenly spread into every space in the action. After a couple dozen shots the oil mixes with the carbon and turns into mud and sticks where its needed .
I don't write for Popular Mechanics so I can't tell you if motor oil is the best choice. All I can say is that it seems to be working for me. The action is slick and cleaning the BCG only requires wiping with a rag.
I still use CLP to protect against rust on the outside of my guns.