Everyone should be aware of the problems like turning on a staircase or within a doorway with a weapon. Pretty annoying.
Thanks to General Baron and especially rocko for the idea and realization!
It exchanges the collision shape model for infantry animations where it is need with the one that is used when you have lowered the weapon.
It improves the playability already quite much. This version changes standing, crouch and weaponReload's collision shape. The one for lying is still missing. Once all issues are sorted, there will be an update.