I was lucky enough to have someone in the USA reach out to loan me a VHS-2 magwell and magazine to take a look at it and see if there are any mags available that would work in it.
A number of sources have claimed that the VHS-2 magazine is a G36 magazine, and the answer is "yes" and "no"
A VHS-2 magazine is definitely based off a G36 magazine, BUT, it tapers towards the front when looking down on top (picture showing the VHS-2 magwell, VHS-2 mag in the middle, and G36 magazine at the bottom.) This taper means that G36 magazines will NOT fit in a VHS-2 magwell. Also, the locking studs to connect two magazines together are in different locations, so you cannot even connect the two mags together (not that you would really want to, but an interesting side note...)
Also, the second image shows a G36 magazine inserted into a Hellion with no magwell- you will note it is holding in there purely by friction. The VHS-2 magazines are ever so slightly narrower than the G36 magazines, and although a G36 magazine can be forced into the receiver opening and it appears the rifle might feed, it is not going to be reliable to get it to seat properly.
Ironically, it appears that VHS-2 magazines might fit in G36 magwells, but I don't have a complete G36 in house to confrim, just a stripped G36 magwell.
I did even try an AUG magazine out of curiousity, and it does slide into the VHS-2 magwell, but the mag catch features prevent it from inserting high enough to work.
If I were to hazard a guess, VHS, probably redesigned the magazines to ensure they would be supplying the magazines for the rifle contract, and that G36 mags could not just be re-used (both from a corporate and reliability standpoint this makes sense if you are the rifle manufacturer)/
Sven
Manticore Arms