Stop first person tool sway

Tools in first person moves around me when walking, is there a way on disabling it?

You can switch the game to R6 to stop the tool sway. If your game is meant to be in R15, you can create a custom holding animation that does not include swaying.

my game already is in R6, also not only tools sway but also things welded to character for example vest

Do you have any custom movement/tool animations?