How to copy code blocks in the editor?

I'm making a gun mod, and each gun mostly reuses the same code for reloading, it's all essentially: "if magazine is in inventory, change empty gun to loaded gun item and remove mag from inventory" - The problem is, it takes quite a while to put these code blocks together and define the items for each one. It would be much easier if I could just copy the base code blocks and then change the items that need to be swapped, change the reload time etc. Is there a way I can copy the entire "If, else if" segment and all the code within it from one item's code section to another?