It's hard to create nation specific infantry equipment, because there are a bazillion things included in them.
Generally speaking 1 infantry equipment is a kit for a 10 men squad. Rifles, MGs, SMGs, mortars, mines, RPGs, clothes, spare ammo, and the list could go on and on.
If you're looking for some flavor
@Vonboe already made several great national specific icons for infantry techs. You will be able to use them without messing up the checksum. (If he uploads the mod when the game comes out)
https://forum.paradoxplaza.com/forum/index.php?threads/infantry-tech-tree-japan.830482/http://data:image/jpeg;base64,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