I figured out how to make the Spec Ops Helmet appear naturally in both Germany and Russia maps, although after doing some investigation into .dat files in "Unturned/Bundles/Spawns/Items" folder with some help from Bash's "grep" command:
grep -R --include "*.dat" "[^0-z]1525" .
Since it only appears in Washington and PEI spawn files so far, I had to use the Spec Ops Vest's ID to search for other spawn files.
The file to be edited turned out to be "Special_Low_Clothes.dat" which includes every Spec Ops clothing except the helmet and is referred to by four separate spawn pathways, two for each map.
The instructions are as follows.
Open the "Special_Low_Clothes.dat" file with any text editor.
Change the "Tables" value from 5 to 6.
Add "Table_5_Asset_ID 1525" and "Table_5_Weight 10" in new lines below all previous ones.
MomoVeria wrote: How to add Rattlesnake to Russia ?
Quick question. Which weapons or other items exist in Police Stations in Russia? You'll need to know the IDs of existing police items in Russia to search for files they will appear in, also assuming that you'll want the Rattlesnake to spawn only in police stations on that map.