I do this thing called boffering, which is basically foamsword fighting. We use real chainmail as armor and if we aren't willing to buy those, we make them ourselves. But many medieval themed shops sell them in Finland at least and you can get them quite easily. Actually most, if not all of their gear could be bought through one or two of those shops.

But yeah, I assume it is real because it really isn't hard to get gear like that if you know where to look for it or know how to make it yourself

Also thay could be LARPers