I'd go with the new narrow shoulder body, it has such a better shape. sometimes if the heads are a midge to small the regular broad shouldered TT makes the figure look like a pin head. Plus I have a narrow shouldered TT that I'm using for James now
I don't think anyone makes a 1/6 H&K UMP-9. Several people do however make the H&K UMP-45 which is my understanding from outward appearances is the same gun except the UMP-9 uses a banana clip instead of the straight clip found on the UMP-45 and UMP-40. https://en.wikipedia.org/wiki/Heckler_&_Koch_UMP
I know of three companies that make the UMP-45
21st Century: Modern NATO Weapons Set Series I
Dragon: G-36 Heer Set
Hasbro: GIJOE Weapon Tech MP5 Submachine Gun Set
It should be an easy bash to convert the UMP-45.
I know folks think the standard TT is a bit bulky, but isn't that the body that Feng is using with his new Daniel Craig head in Xenovipers thread? I don't think the standard TT body looks bulky, even in the pictures with the tux.
And NO my opinion isn't being influenced by the fact that I just received two standard TT bodies in the mail yesterday
If Kunch feels that the slim shoulder true type is better proportioned I'll go with his decision. Then i'll just have to get hold of a slim shoulder true type to go with the suit.