I realized it yesterday, the "spot" items. This type of item is a standard static item, but it also has a trigger (or many triggers) that equip actions (bullet s/ lasers / static) when standing inside of them. Actions work without making any change inside of the mode script, which means they work in Battle, Siege, Elite and any other mode. It's only not possible to display +1 animation and right killfeed notice.
There is my little demo & tutorial video about this kind of items.
https://www.youtube.com/watch?v=H1npDoFuDJ0
Info: Last part about enabling items embedding was not rendered (ty vegas), I think everyone know how to.
![Wink ;)](./images/smilies/icon_e_wink.gif)