This leash is available for purchase just search for it but be forewarned you may gets some angry looks from passersby and may get tasered by the police. Every day items in the shape of weapons are becoming a hot commodity.
For the right price, well on vacation in Russia, you can ride on a tank mounted with the XM307 25mm Machine gun and destroy some targets of your choice. They will also throw in a vest full of AK-47 banana clips you can unload at the range. The whole experience will cost you less than the plane ticket to get there.
If you are traveling to russia and want to fire some military weapons not normally available to the public and not found at your local gun range hop on google and search for some private gun collectors. Just make sure not to piss anyone off or you may not return from the mother land.