some years back I took in a Marlin 60 little shot but much truck-carried as part payment on some welding work.
I sold it at a fair price to a young nephew that useing an online guide disassembled completely, cleaned and put back together mounting 4X Simmons.
after some sight-in & practice he now practices on walnuts standing off hand at around 50yds and never misses. any man at 100 yds is in deep kim-shooey.
if shot off rest it's remarkable the groups he gets useing MiniMags.
he was wondering about a SHTF gun but I told him - 'looks to me as if you've got one'!