Wow, that's very cool ;-)

Over here, I've always pronounced the S like the Z sound, like Mozin. But in Russian in fact it sounds more like the way Bruno writes it ;-)

It's mostly in print that it drives me nuts here, Moisin being the most common one.

Moisin - Google Search

And from that same search, have a little fun with this one;

Here's an excerpt;

AK: Your rifle comes with a cheap nylon sling.
AR: Your rifle has a 9 point stealth tactical suspension system.
MN: Your rifle has four dog collars tied end-to-end.

AK: Your bayonet makes a good wire cutter.
AR: Your bayonet is actually a pretty good steak knife.
MN: Your bayonet is longer than your leg.

AK: You can put a .30" hole through 12" of oak, if you can ever hit it.
AR: You can put one hole in a paper target at 100 meters with 30 rounds.
MN: You can knock down everyone else's target with the shock wave of your bullet going downrange.
Of Arms and the Law: Comparison of AK, M-16, and Moisin-Nagant