If it has been in a structure fire it probably has been exposed to 900-1500 degrees, maybe more. You have no idea what the metal has been subjected to.
Not a good thing, even at .22 LR pressures.
First priority take the receiver to a good gunsmith who might be able to evaluate the metal condition.
If salvageable you could rebuild with new barrel, wood, springs, spending a lot of money (think polishing a turd) to restore the rifle.
Wall hanger decoration piece is probably your best bet .........
The cost of a vintage 39A in good shape will be a lot less than restoring your rifle.
