Russia can be a bit tricky. Amazing and friendly people but,,,nobody speaks English at their airports!!( Im sure more people speak English in but --ck nowhere Siberia than the ones they have hired at their airports)Was there in May and brought some goodies from Stalingrad and also got detained at one of the Moscow airports while trying to leave.Close call!!They have export bans on historical stuff that includes WW2 era artefacts. Also on anything with Swastikas which are illegal in several Euro countries and Russia. Ask me how I know

So my best advice is if you buy something WW2-ish in Russia., try mailing it home rather than carrying it out,,it will take 5-6 weeks to arrive (slowest mail in the world Im guessing)but its a lot safer and more likely to get out. Lots of ebay WW2 stuff gets out regularily but by taking it yourself you are wide open to arrest or detention-ie maybe miss your flight. Opening a whole new can of potential whoop-ass. A bud of mine even got detained for trying to bring back his grandfathers WW2 medals! But those were so personal that he wouldnt take a chance parting with them to mail them. I'll mail stuff back next summer when I return

. I also have two WW2 items inbound now from a bud in Stalingard,, hoping they make it and they probably will.
A bayo , rusted out or new, should not be an issue for Cdn import, just store it in your stowed luggage if you wish to go that route, but I guarantee it will be scanned and examined and if deemed illegal due to historical significance, expect some issues. Ive never heard of the steel hardness issue that KGB mentioned and it wasnt an issue for me as I brought a nice new Hungarian kitchen hatchet I bought in Budapest to Moscow, to Stalingard, back to Moscow and then out of the country.