The idea and screenshots are provided by AVSniff, forum.guns.ru. Greg-Z (talk) 07:18, 19 December 2018 (EST)
Addiional Images
Nagant M1895
Mauser C96
Mosin Nagant M1938 Carbine
Discussion
My guess about the second shotgun
It's only my guess, but I think, that it may be a Murata Rifle: it lacks barrel bands (while "Berdanka" has a single one), grooves on the stock (which has a Frolovka). In comprassion of this gun with the other screen appeared Muratas, it can be see, that has the similar position of the front sight and widing part of barrel. The rear sight is lack, so, this part may be brocken. It also appeared in at least one Soviet movie. I also found this site, which containe an imge of the Murata bolt, but it complitely in Japanese, so, I couldn't read it. Pyramid Silent (talk) 10:43, 19 December 2018 (EST)
The barrel leight
The widing part of the barrel.
The shape of the stock:
See several additional images of this gun:
None of these features match Murata, as I think. Also note different receiver shape. Greg-Z (talk) 14:22, 19 December 2018 (EST)
I was wrong, sorry. It's absolutely not a Murata. The only differ reeses (from Berdanka) is the lacking of barrel band. Pyramid Silent (talk) 14:35, 19 December 2018 (EST)