To Reproduce
Steps to reproduce the crash:

1. Take a gun (like the Glock or the Deagle)
2. Hold it in your hand
3. -Game Crash-

Screenshots
I can't, because I'm crashing x).

Versions (please complete the following information)

• Forge: 1.12.2-2838
• Flan's Mod: 1.12.2-5.5.2

Crash Log
The file is attached below.
2019-10-27-2.log

Additional context
I've tried to reinstall Flans and the Modern Weapons Pack , but I'm crashing too.

I doesn't work... my crash report :
crash-2019-10-28_00.07.11-client.txt

Please try the latest version from here: https://github.com/FlansMods/FlansMod/releases

I'll try that, thanks. If the crashes are here, I will send another crash report ^^.

It looks like your system is giving a non-standard code for your sneak keybinding.
I believe that I've fixed the crash by using Minecraft's built-in keybinding functions. I'll link a new mod jar for you to test soon.

Please unzip the following file and see if the version inside fixes the crash.
Flan's Mod-1.12.2-5.6.0-beta.6.jar.zip

Hello Chris, two hours ago, I changed my sneak keybinding, and the bug was fixed ^^'.
Thanks a lot for your help, I will take this Flans Mod !
It's a very nice mod you made :p !