I gave one away for parts. Too much pitting, a replacement for a supposedly "select grade" that wasn't when it arrived with a cracked stock. The pitted replacement was in worse shape.
Had several here over the years, while I do respect them for their historicity I don't revere them as supreme examples of the gunmaker's art to be preserved for millions of future gun-owners who simply won't care that much about 'em, for the most part.
It ain't the collector market that's driving sales on these rifles, it's the cheap prices of guns & ammo.
In beat-to-hell condition with cracked & warped & flaking wood, handguards that won't stay put, pitted & rusty steel, and/or mismatched numbers, I see nothing wrong in going to town on one.
Last one I had modified was dropped into Boyds wood & had the front sight replaced with an adjustable post. Nothing else done.
Beater rifle, with one oogly crater in the outside of the barrel exposed when the warped military wood was jettisoned, and an indifferent bore.
I feel no guilt whatever.
Surprisingly, it has outshot the fully-sporterized scoped version at 100 yards with surplus ammunition in both.
There are Mosins & there are Mosins.
Get a nice one, keep it nice if you want.
Get a clunker, do whatever.
Get one with good steel & lousy wood, ditto.
There'll be enough unaltered specimens floating around the pawnshops once the surplus ammo's gone to satisfy the collector market.
Denis