Hi, I just got the shooter pack and I am having the same issue. Everything works on the Demo scene. Also, it works with the Proto character when I start everything from a blank scene. When I import any new character (I'm using the Challenger from The Blacksmith and some characters from Mixamo), the character's upper body gets all distorted when I equip the weapons from the Shooter. I'm new to Unity so I'm not sure how to disable the UK options as you mentioned. Could you provide some steps to troubleshoot this? I'm using Unity 2018.5f1 and Shooter 2.8 Thanks for any help.