The way I read it is that it's more than it was made in Russia, that was pretty obvious, the title implies that they were brought from the Russian stockpile rather than the Ukrainian one.
I'm not sure which title you're commenting on, but if it's the current HN title, note that it's been changed. It previously matched the title of the linked article, which is "MH17 missile 'came from Russia', Dutch-led investigators say."