These were used throughout Europe, Russia etc as mid-level marksmanship rifles. 'Clup guns' are what these are sometimes referred to as they (and several others) were commonly used at shooting clubs. These shooting clubs were/are very popular as in many countries it was about the only way you can shoot. Competition among these clubs are legendary, and its where the best Olympic shooters are/were groomed.
This is a Vostok CM-2 gen2. The gen1 was virtually identical but the stock was a bit more basic and had no adjustable butt. The gen3 was virtually identical also, but they upgraded the side mount rear peep to a top mount. The gen3 is obviously the most desirable in the US due to being able to easily mount a scope. The Newest model that was offered in full length and cadet model at several retailers prior to the recent ban were very similar also, but with more modern peeps, alum trigger housing etc.
The 'Vostok' is simply line of target rifles in which there were several rifles under. These guns were made by Izmash which is the commercial (sporting) entity of Izhevsk.
There is also a model Ural which has three locking bolt lugs as apposed to the two on the CM2. The Vostok Ural also had a gen1,2 and 3 evolution in similar fashion to the CM2. My Father (Slumbering Bear) has been winning every single 100y competition he enters with his Ural over the past two years... The Ural and CM2 are no joke when it comes to how well they shoot. His competitors are shooting $4,000 guns and he kicks their ass every single time.
The Ural and CM2 have a fully adjustable single stage trigger that goes down to about 4-6oz. The bottom of the receiver is square and has a large diamond meat-hammer type knurling that bites down into the wood when the action screws draw it down. The barrel is 100% free float, hammer forged, and hand-lapped. They also have match-chambers.