This is a ProMag STEEL 10-round extended magazine for CZ 452 rifles chambered in .17 HMR
These upgraded ProMag magazines are made from heat-treated blued steel with anti-fatigue chrome silicon springs—ensuring reliable rimfire feeding and maximum service life. CZ’s 452 rifles are the gold standard of mid-level bolt action rimfire rifles—with a serious presence in competitions and target ranges all over the world. Combining hand-crafted engineering with precise manufacturing and ultra-reliable magazines, it’s the best rimfire platform for the money. Engineered to meet or exceed CZ’s factory standards, ProMag magazines are made in America and come with a lifetime replacement guarantee, so you’ll always have a working magazine on hand.