Yes a Mosin Nagant 1891, cal. 7.62x54R MM, with the new clearer scan I agree it was made by Tula. Date was very fuzzy on the first scan, with new one it is certain it was made in 1894. Early 1891's had swivels on the magazine and forestock (1894 date explains un-removed mag swivel), these were replaced by dog collar slings in the early 1900's when done the rear swivel was not always removed. These are also found on later dated guns, when older parts were re-used to rebuild damaged guns (done by the Finns mostly).