I have one. Give me a minute and I will put a few pellets across the chrony.
Maybe contact this place, it is out of stock right now but may be an option.http://www.canadashootingsupply.ca/baikal-izh-46m.html
There is an IZH 46 and a 46M with the 'M' having a longer compression tube thus producing a bit higher FPS. It appears that an adjustment can be made to the piston - see link - to tweak the performance, FPS.http://www.network54.com/Forum/79537/thread/1390458360An FPS of 490 - 500 seems to be about the typical max. w/7.0 grain pellets for the 46M.Hope you find one because they are fun to shoot.