The Rock Island Armory Magazine is a standard factory replacement magazine. This magazine is for RIA 5.0 pistol models chambered in 9mm Luger and the mag holds 17 rounds of ammunition. Each magazine body is made from quality steel and the exterior of the magazine features a matte black finish. Additionally, it is worth noting that the magazine is made to Rock Island Armory'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.