I had a quick look at this site, as I had no idea what it is, apparently it's 3D gun printing. Interestingly, their robots.txt disallows all indexing bots, so

I had a quick look at this site, as I had no idea what it is, apparently it's 3D gun printing. Interestingly, their robots.txt disallows all indexing bots, so Google etc. show no descriptive info. This seems a rather odd thing to do ?