The description of Accessing the Virtual Arsenal is outdated (https://community.bistudio.com/wiki/Arsenal). ["AmmoboxInit",[this,true]] spawn BIS_fnc_arsenal; will not work for any game versions >=1.26
the only answer to this problem can be found here http://feedback.arma3.com/view.php?id=20345
Best to use addaction, unless you manually place into each init field. This is a duplicate issue.
What do you mean by will not work?