If we enact such laws, then only criminals will have guns, and we will all be defenseless when our homes and our lives are at stake. Furthermore, without this deterrent, criminals will become more bold than ever, even if they do not use guns in their crimes. The last example suggests that we need some additional steps in our cookbook. Look for the conclusion. Look for explicit premises.
List premises first, then conclusion.
Make simple sentences if possible. The more complicated example exhibited more complex structure, with sub-arguments within the main argument. There are three kinds of argument structure, which we can diagram in the following ways. Sequential structure is present in arguments where a single premise supports a conclusion. Converging structure is present in arguments where several premises independently support the same conclusion.