How can I remove extra space below text fields?

On the sections entitled "Firearms #1" and "Firearms #2" there are random vertical gaps between the fields below on the following form:

https://form.jotform.us/70886283122155

I have tried inspecting these items but cannot find the error. 

Adding the following code to your form will reduce the spacing below the HTML elements:

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

.form-html {
    padding-bottom : 0px;
    margin-bottom : -25px;
}

Here is how the form would look with the code added:

https://form.jotformpro.com/70887525947978