Year after year, ProMag has increasingly become one of the leading manufacturers of firearms magazines in the world. Gun enthusiasts and law enforcement personnel have agreed, be it for recreational "plinking", competition shooting, or law enforcement, Promag is the source you can count on. This proprietary magazine is especially designed to work with the ProMag AA98 and AAT3 stocks. It is made of polymer material and holds 7 rounds with a 5 round limiter. The springs are precision wound using heat treated chrome silicon wire. These magazines are designed to stand up to years of constant use and still perform without any difficulty. Features and Specifications: Caliber: .300 Winchester, 7mm Remington Magnum, .338 Winchester Magnum Capacity: 7 rounds Body Material: DuPont Zytel polymer Spring Material: Heat Treated Chrome-silicon Wire Follower Material: Self lubricating, polycarbonate follower Follower Color: Black Base is molded from DuPont Zytel polymer Finish: Black Fits: Archangel AA98 and AAT3 Rifle Stocks with Type B Magwell