Filtering Enabled causing death, can anyone help?

My game is a First Person Shooter and I remodel MuYhEt's Glock 18 (https://www.roblox.com/library/321870523/GLOCK-18) so basically, everything but the appearance is the same. I discovered and turned on Filtering Enabled so that my game could leave Experimental Mode but now, everytime I try to unequip or change weapons using the numbered hotkeys, I die. This also happened to my friends too when we tested the game out in normal Roblox.

I have no idea why this is happening and what would cause this to happen. I am not skilled in Roblox Lua, can anyone help? See the link above for the gun. Equip the gun then unequip it to recreate the death. Make sure experimental mode is off when recreating it.