weapons keep switching

I'm getting my brother to play this game but his weapons keep switching and he cant stop them.

Try to unplug your keyboard and plug it back in. If that doesn't work try to clean it with a can of compressed air.

Check your keyboard settings in game too maybe there is a button you accidentally changed which rotates the weapons. It is supposed to be middle mouse button.

Sounds like it is his mouse, try to delete middle mouse button from the settings, if that works at least you know it's the mouse causing it

Make sure you don't have any kind of macro on-going process that makes your brother switch weapons every second.

I have the same problem sometimes and I just have to restart gunz. After that it won't switch.

I was also having that situation sometimes.. you need to restart gunz so it'll be back to normal..