The No Reload option does not work properly. When used, it actually causes the weapon to need a reload after every shot fired. All other options work fine.
Does it happen to all guns or just some? As stated in the readme
Numpad 3: No Reload - toggle on and many weapons that have ammo are
unlimited. Leave off until in the mission starts. May
affect weapons in ways not intended, so experiment and toggle
off if needed.
Key word being "many" and not "all"