 The V70K was produced until 1955, with a total of 3,113 built.One drawback was that the 70K required a barrel change after every 100 rounds fired.To improve on this, a twin-barrel water cooled mount, the V-11 (called "W-11" in East Germany and Poland because of different Cyrillic transliteration), entered service in 1946, and was in production until 1957.