Is 1 Cor 16:51-52 about the Rapture?

Chuck Smith writes in "Answers for Today" quoting 1 Cor 15:51-52 as evidence for the Rapture. He writes:

In I Corinthians 15:51-52 Paul said, "Behold, I show you a mystery; we will not all sleep, but we will be changed [metamorphosis, a change of body] in a moment, in the twinkling of an eye." You won't even realize it's happened until it's all over. Suddenly, you're in the presence of the Lord with all the church! We the Church will be changed.

The context of this passage is the Second Coming of Christ and the resurrection of the dead not a pre-tribulational rapture. Paul says nothing in this passage about the tribulation and the timing verses the rapture but it is completely clear that the context of this chapter is the Second Coming.

This passage is about the change that happens to people who are alive at the time of the second coming. As the ancient creed says

From thence (heaven) He (Jesus) shall come to judge the living and the dead.

At the return of Jesus there will be people still alive who do not have a normal death. Their bodies are transformed into their resurrection bodies. The analogy of the butterfly is a great one. From the worm comes the butterfly. Not a different body at all, but something quite different at the same time.

This passage is not a proof text for the Rapture at all, but the use of this passage by Smith demonstrates the weakness of his case. There are no pre-trib rapture verses in the entire Bible.