No need. Go to the console. There should be a big box on the top and 3 long horizontal boxes at the bottom.
1. at one of the long horizontal box type "jna_datalist", a long list of whatever you have in the VA should show up.
2. Copy the list to notepad, Edit the list to whatever you want in the VA. After you done, Copy it.
3. Go back to the console. In the top big box, type:
jna_datalist = (paste what you just edit)
4. Local Exec.
5. Done!

@山風YamaKaze, your comment about the virtual arsenal in Arma 3 is very useful :) Thank you very much!

引用自 山風YamaKaze：

No need. Go to the console. There should be a big box on the top and 3 long horizontal boxes at the bottom.
1. at one of the long horizontal box type "jna_datalist", a long list of whatever you have in the VA should show up.
2. Copy the list to notepad, Edit the list to whatever you want in the VA. After you done, Copy it.
3. Go back to the console. In the top big box, type:
jna_datalist = (paste what you just edit)
4. Local Exec.
5. Done!

How can i delete items in the jna_datalist?

引用自 Żiomek：

How can i delete items in the jna_datalist?

If you haven't figured it out yet, when you paste it in Notepad you'll see the whole list of all the items. Unfortunately it's mostly just the file names rather than easy-to-read names, like "SMG_01_F" and stuff. If you wanted to remove that (I believe that's the Vector SMG), then delete the whole bracket:

["SMG_01_F",-1],

Remember to delete the comma (,) after the bracket as well if there is one. If it's the last item in the list then there wouldn't be a comma.

Ok how to change uniform of AI squads? do i update the arsenal or not to do that?