Along with the common SVD, Dragunov designed a shorter version of his famous weapon in caliber .22LR. TSV-1 (Trenirovochnaya Snayperskaya Vintovka) was meant for training army sharpshooters. It had the usual SVD buttstock and a handguard, a more laconic receiver, a ten-round detachable pistol-type magazine and a shorter barrel. The weapon had excellent accuracy! At a distance of 50 meters, skilled shooters in a prone position were able of firing a group of ten shots all inside a circle of 12 mm. The rifle had a unique firing mechanism, integrated with a free blowback bolt carrier, firing pin, return spring and a top bolt cover.