Hatsan Vectis upper shroud lose

[Bargain Hunter]

I picked up a refurb Vectis, it arrived literally looking new, the air probe inserts doesn't even have a mark on it...
however, when I was toying with the sights, I noticed that the upper shroud is lose.. ever so slightly but it is for sure.
I tried the screw for attachment to the lower stock but that screw is tight...
has anyone else have the same issue.. should i be worried? wouldn't this throw off the alignment of the sights with the barrel?
do I have to remove the moderator to tighten the nut inside?

please advise.

[PumaCarl]

You would have to check the retaining nut on the end of the barrel. Do a search for youtube videos to take the muzzle brake apart, actually here:   (between 13:50 - 14:15)  Just tighten the nut with the 14mm wrench if you don't want to take the  shroud off.

 I cut my muzzle brake off and use my DonnyFL Tanto suppressor as the retainer. It is a whole lot quieter too.