I (won't rant, won't rant, won't rant) bought a 51M at a show. I had been looking for a Mossy semi for a while but, wasn't familiar with this model. It was sold (and purchased) under description "all it needs is a good cleaning.(won't rant, won't rant, won't rant) Got it home and, it did need a good cleaning...AND an extractor, firing pin...god knows what else. I acquired a pin and, extractor for it and, it still didn't function properly. Also discovered it should have been in full-wood, it came cut down. Great weight n' nice wood (what remained). The few shots I did take (no rear peep on it) with it using normal sights, were quite impressive. Accurate for a .22...extra accurate for a semi! It was made about '39 and, makes me wonder why the newer .22's just don't seem as accurate or, tough.
I was sooooo cranky about the original deal, I couldn't complete the project. The only project I've ever just dumped.(won't rant, won't rant, won't rant) I do feel pretty good knowing it found it's way to a capable Mossy-Man and, should be running as it should soon.
The bolt actions I've fired were also scary accurate...so far, my fav. is a 46B my buddy inherited.
Seriously, very tough to walk by one!