CZ-USA CZ 550 Rifle Magazine .300 Win Mag 3 Round Blued 1 Pack Steel. Specifications for CZ-USA CZ 550 .300 Win Mag 3 Round Rifle Magazine: Manufacturer: CZ-USA Color: Blued Fabric/Material: Stainless Steel Magazine Capacity: 3 Round Caliber: .300 Winchester Magnum Gun Make: CZ Gun Model: CZ 550 Package Contents: CZ-USA CZ 550 .300 Win Mag 3 Round Rifle Magazine What firearm models does the manufacturer say CZ-USA CZ 550 .300 Win Mag 3 Round Rifle Magazine is compatible with? The manufacturer says that CZ-USA CZ 550 .300 Win Mag 3 Round Rifle Magazine is compatible with CZ 550CZ-USA 14005-3RD: CZ 550 Rifle Magazine .300 Win Mag 3 Round Blued 1 Pack Steel