To throw in a little additional info on those rare Finnish cavalry carbines, which were actually short rifles, here's what I got from a site called "Jaeger Platoon."
There were only 2,200 M/27 cavalry rifles manufactured. I guess that's all they thought they needed. Of those that were still around after the war, 304 were sold in 1960 through Interarms. The remaining that had not been lost in battle were destroyed (as not worth saving) in 1944 but the metal parts were sold as scrap metal, to who, it didn't say. Behold, some of those parts ended up in new stocks and being sold as genuine M/27 rifles, which in part, they were, but in part, were not. Buyer beware.
Another interesting carbine was the Swedish Mauser carbine, which may have been a M/95 (and I'm not going to look it up). I've seen all of one, though they were in a lot of magazine ads back in the early 1960s. As they were made, they were a shade under the legal limit. So rather than throw them back, the importers added a barrel extension of a half-inch or so.
Shoot low, sheriff. They're riding Shetlands!
Underneath the starry flag, civilize 'em with a Krag,
and return us to our own beloved homes!
Buy War Bonds.