OK. MacGyver has shamed me. I'll dig out my Mosins' tomorrow and get a "family pic" and post. I warn in advance that my photo skills leave a lot to be desired.
+1 on Murphy's soap, altho I don't think it cleaned very much.
0000 steel wool smooths and lightly scrubs, just don't use so much muscle.
BLO-boiled linseed oil. Use when you want an oil-finished stock. You want light coats rubbed in with the fingers, I use rubber gloves. Wipe off excess with clean rag, let dry, apply more coats as desired. When dry, you can polish to a sheen. Very durable finish, and can be "repaired" by repeating above procedure. if you don't like your result, strip off the BLO with Denatured Alcohol and re-apply BLO. The wood is most likely birch, so you're not going to make it look like fancy walnut, regardless of what method you use. Refinishing is fun, and kinda hard to screw up(even tho I've tried).