The red magazine is a bakelite Russian Tula, there are 5 generations of this type of mag and this is from 1st to 3rd, going by the photos. I am a bit of a Russian mag nut and collect all sorts of them. These are a run of the mill sort, but being Tula they are a little more desirable than would be an Izhevsk.
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I forgot to add, VERY nice rifle! I would love to have one even as a clone/semi-auto.