The CZ 600 ERGO is a premium model with a light profile barrel equipped with a specially designed, fiber-reinforced polymer stock with sophisticated ergonomics, which provide maximum shooting comfort and high accuracy. Optics can be mounted on standardized rails that are integrated on the durable, aluminum receiver. When the magazine lock is activated, the firearm changes to a fixed magazine configuration. Available in .223 Remington and .30-06 Srpg.