CZ-USA manufactured this magazine for the CZ 550 American rifle, chambered in .22-.250 Remington. The maximum capacity for this magazine is 4 rounds.
CZ products are imported exclusively by CZ-USA, a wholly owned subsidiary of the parent company, Ceska Zbrojovka a.s. Uhersky Brod, (CZUB) of Czech Republic. CZ firearms have been available through normal channels in the US since 1991, through such importers/distributors as Bauska, Action Arms and Magnum Research.
The 550 American is a contemporary hunting rifle with the premium quality and features you expect from CZ.