Built in the sixties of the twentieth century Soviet SWD sniper rifle is an individual weapon repeat. The principle of operation is based on the discharge of powder gases through the side hole of the barrel. Gas piston short stroke. The piston movement of the gas is transferred to the cocking lever by a light rod pusher. Locking by turning the lock to the left (three bolts).

The trigger mechanism of the interrupter only to fire a single. Power from box magazines with a capacity of 10 rounds. On the front of the barrel slotted flame arrester (in early versions also cast bayonet). Mechanical sights consisted of bow ties and viewfinder.