I like this add-on, particularly how it's implemented in multiplayer, but in singleplayer, physical bullets aren't working for me at all. Regardless of whether it's me or an NPC firing guns in Bullet Time, nothing happens to the target(s) except light particle effects showing where the bullets would've hit, as well as any knockback it might've normally produced, no damage done whatsoever. I found that this was because the physical bullets were causing physics errors, and being removed by the game as soon as they spawn.

This is the sort of error that prints in the console when I fire a gun in Bullet Time:And this is the one when an NPC fires a gun:
If this can't be fixed, the least I could hope is for a way to turn off physical bullets altogether in singleplayer.