Is this a factory 10mm mp5 barrel

[Miacovet]

I am curious if you guys thing this is an Mp5 10mm barrel or not. this is the only marking I could find on the barrel. the barrel was refinished so there could be other markings I just don't know.

thanks.

 

[Miacovet]

I alos a posted a picture of the magwell because I wanted people to look and see if that was a remark or the actual original markings of the German MP5 10 mm Magwell

 

[xsefan]

All barrels from hk I have seen have been marked. I have not seen a lot of them 30 maybe.