Piotr
Google
The collection of arms is quite impressive, although it could include a bit more of post-ww2 firearms. I must say the light is terrible in most of that section, with one case of the place being so dark I had to use a flash. Still worth a visit, they posess a number of unique items that you probably cannot see elsewhere. I only visited the firearm section so can't say anything about other parts. There are free lockers inside, and if you're under 26 the ticket is free, that seems to apply only on sundays though.