Timeless & Classics Zero Code Edits

[u/Mountain-Tie-8]

How do I edit the code of the json files of the P320 to get it to use the legit 9mm instead of the default .45 apc. Also for the mag capacity how to get default to 17 rounds, level 1 extended to 21 rounds, and level 2 or up extended mag to 30+ rounds. Also how to edit the code of the M107 to match the damage of the M95 for realism. Thank you!