As the title says - if you've read the review made by PSR, they raise some points I was wondering about myself, especially the origin of the machine gun. Don't get me wrong, they look nice (and I'll even get them in September...), but some explanation on the weapons would help.

Maybe some extra "useful gunners" in an upcoming artillerymen set to serve the mortars...

Well the machine gun was discussed here at the time, and by now PSC have updated the review accordingly. It is a copy of the Lewis gun.

The tall mortar was used from 1941 on with 110 being made. The model's barrel should be shortened.
http://www3.plala.or.jp/takihome/mortar.htm

Another convincing PSC review, and despite the criticism I will buy at least one set, as happily these fellows are not much too tall for WW2 Japanese. Regards, Pa

See the Handbook On Japanese Military Forces 1944:

Type 92 MG

Mortars