I don't know what it is, but the black coating on my Para Ordance "Big Hawg" is not tough at all. To make a long story short I was in a situation where I legally had to lock my guns in a small combination lock box. I didn't expect to get into that situation so I only had the one box. I put both my FNP-40 and my Big Hawg into the box. When they came out a few days later the Big Hawg was scratched and dinged up. Not too bad, but obvious. The FNP-40 didn't have a mark on it. If you can find out what FN uses on it, try for something like that, it's pretty good.