The model 511, the inaugural model of this series, was initially produced in 1939. It featured a plain walnut stock and was designed as a lightweight sporter. Production ceased in 1962. In 1940, the model 513 was launched, available in both sporter and target configurations. The 513T Matchmaster was a 9 lb target rifle. The sporter variant was discontinued in 1956, while the target model remained in production until 1969. The model 521, recognized as a junior target rifle with a weight of 7 lb, was manufactured from 1947 to 1968. It is also compatible with the nylon 11.