Please note magazineGroup config attribute is documented in https://community.bistudio.com/wiki/Arma_3_Weapon_Config_Guidelines - as such I believe this issue should be given more attention. Lack of common magazine interface is rather serious limitation of 3rd party mods.

Can you please re-upload the sample? Edit: disregard, found out u mean our own sample ;) (shame)

I confirmed this probrem.

'magazineGroup' not work ar all. And BI self not used in ARMA3 config !

I want to use 'magazineGroup' so much !

Just tested it. magazineGroup is working just fine in the backend.

If you try to drag a incompatible magazine into the weapon ammo slot in inventory it is red.
For a magazineGroup magazine the slot is white. but when you drop the magazine onto it nothing happens.
addPrimaryWeaponItem works just fine. The magazine is in there and you can shoot fine.
If you take the weapon out and drop it into inventory you get the mouse wheel menu option to reload it again. It loads just fine and you can shoot again.
But you can only load the magazine you last used via mouse wheel menu. Or any non-magazineGroup compatible magazines.
So I take drop the magazineGroup mag into inventory. I can now reload the magGroup and the normal magazine via mouse wheel menu.
But if I load the normal one the magGroup one disappears from mouse wheel menu.
That could be fixed with scripting. Just add a mousewheel action that removes mag from inventory and calls addPrimaryWeaponItem
The inventory knows it's compatible and the weapon knows it's compatible.
Just mousewheel action and drag-drop into magazine slot is not working

I fixed it: https://www.youtube.com/watch?v=YMLc5hHC0tQ
Have a BI dev contact me and I'll walk him through the necessary changes. It's really very easy. It is not as performance friendly as I'd like (Only work is being done once at game start. no runtime difference)
but that's because of the decision to put the groups into the magazines array which wasn't mine.

:D

@dedmen That's awesome!! Now let's hope BI gets around to this at some point :)

BI is currently working on magazineWells. https://github.com/CBATeam/CBA_A3/issues/108#issuecomment-359797633
Let's hope it turns out good.

This task can be closed now.