[NorthMountain]

The SKS she had could fire fully auto, but why? It had a 5 round built-in magazine and was not replaceable. It needed reloading through the breach after every 5 shots.

That's a weird SKS ... Did you see more than the one set up like that (full auto, 5rd fixed mag)?

[BuffaloJack]

It might have been a 10 round mag. It was 50 years ago and I only had the captured weapon in my possession for about 2 hours. What I am sure of is that the magazine folded down open and had to be hand reloaded.