THE way to clean your gun's gas tube - especially an AR-15 type firearm
The other CLP (Break Free) leaves a light oil base behind, good to inhibit rust and prevent excess wear. However, I use Powder Blast to clean the gas tube and gas block by spraying it into the tube from the breech until it comes out the barrel clean. Clean your BCG as usual and your barrel. The usual CLP in the trigger area and actually use a good oil on the moving parts - YOU'RE GOOD TO GO!