The power mag plus offers all the quality, reliability, service life and customer satisfaction of the cmc power mag 1911 series magazines.The unique power+ follower accomplishes the same tasks as the power mag follower but in a different way.The follower remains within the confines of the magazine tube, avoiding contact with alloy frame material if the slide is released forward with an empty magazine still in place.The power mag plus magazine us recommended for those owners of 1911 pistols with aluminum alloy receivers.Caliber: 45 ACPCapacity: 8rdFinish: StainlessModel: Power MagMaterial: Stainless SteelType: DetachableModel Fit: 1911 GovernmentCapacity: 8