The Winchester Magazine XPR is specifically designed for .300WM and .338WM calibers, offering a 3-round capacity. This detachable box magazine is constructed from durable matte black polymer, ensuring a reliable performance for your shooting needs.Key FeaturesCaliber Fit: Compatible with .300WM and .338WM cartridges.Capacity: Provides a 3-round capacity for quick reloading.Detachable Design: Easily removable for convenient loading and unloading.Material: Made from high-quality polymer for durability.