I would be careful with using bike chain lube in firearms. Some of the chain lubes are wax based and designed to peel off taking the dirt with it. Bicycle chains are also not subject to the heat and impact of many gun parts in action. It might seem great at first but be cautious about prolonged firing sessions. I would rather use BreakFree, ATF or Mobil1 rather than a chain lube.
And yes I actually do use White Lightening Wet type lube on my bikes!