Don't be too sure. We have seen 20+ unstaked from the factory at one time, as well as many that would be leakers very early in their life.
It is such a small task to perform, and so easy to catch at the QC stage of the process that it makes me wonder first off why they don't do it, and second if there is a valid QC process at all.
It could be a useful Tier 3 gun, but it seems like it depends on marketing rather then doing it right from the start.
Fortunately, their are other options.

