The timing couldn't be better. The day after I completed a repair for the stock on a Model 50 - H&R Reising - Cal.45, Harrington and Richardson Arms Co. submachine gun, the previous registered owner called with the news that my NFA Tax Stamp paperwork had arrived in the mail. Approval was three months to the day, even with an address correction request.
The seller had allowed me to take possession of the stock last week, and I performed a wrist crack repair as seen in the following link. http://www.russian-mosin-nagant-forum.com/viewtopic.php?f=13&t=26263
Now with my own Tax Stamp and possession of the action, today was field strip, cleaning and inspection day. Aside from some rather messy powder and dried oil fouling, all the components checked out.
Of course I hit my range this morning and began with three SA cycles, followed by two FA, five more, and then a twenty round mag dump. There is one really messed up cardboard box. Flawless function.
I believe it is a 1943 manufacture, and went to the Michigan State Police in post-war.
Pics, enjoy, and thanks for looking.