Hi, Hyoi! (I always like the sound of that (-:)). I certainly don’t recall anything about “guns” in that context. And you are probably aware of Lewis’s description of his conversion to theism at the end of the chapter, “Checkmate”, in “Surprised by Joy”, i.e. a helpless surrender. That’s about as close as I can come to the image you are asking about.
“Love is patient and kind. Love is not jealous or boastful or proud or rude. Love does not demand its own way. Love is not irritable, and it keeps no record of when it has been wronged. It is never glad about injustice but rejoices whenever the truth wins out. Love never gives up, never loses faith, is always hopeful, and endures through every circumstance. Love will last forever.” (1 Corinthians 13: 4-8)