Just to chuck this into the mix... and because I'm borderline-obsessively looking at MP7's and MP9's, even after getting my 416...
This is currently "news banner number 1" on the Patrolbase website...
https://www.patrolbase.co.uk/umarex-h-and-k-mp7-a1-airsoft-gbb-smg
So that's £290 for a full trades MP7.
From a quick search on reviews etc it seems the upsides of the Umarex are:
1) Full size
2) Higher RoF than TM MP7
3) Slightly cheaper gun
4) ... errr that's it?
And the downsides are
1) Expensive mags (£54 vs £40 for TM)
2) Less good at low temps
3)
Allegedly less reliable
4) No need for a number 4.
5) Five is right out.
Personally I'd question the reliability issue - we know the TMs aren't perfect with sleepy trigger, and chassis cracks, so it's a matter of what breaks on the Umarex, and how pricey to fix?
There are owners on YT and Reddit who say their guns have been perfect, so obviously, as is always the case, YMMV
The mag cost and a more pronounced cool-down effect are the actual deal-killers, in my eyes.
Any Umarex MP7 owners out there care to comment?
Edit: Oh, just happened to notice
@sjhirst has one on his sig. How is it?