The Ruger American Magazine is a standard factory replacement magazine. This magazine is for Ruger American rifles chambered in magnum calibers and holds 3 rounds of ammunition. It is made from high quality polymer. The exterior of the magazine features a matte black finish. Additionally it is worth noting that the magazine is made to Ruger's specifications and tolerances, using the same manufacturing process and materials as the original equipment magazines which shipped with your firearm. This will ensure not only a perfect fit but exceptional operation. 7mm Remington Magnum .300 Winchester Magnum .338 Winchester Magnum 6.5 PRC