Springfield Magazine, 9MM, 17 Rounds, Fits Springfield Echelon, Stainless Steel Construction, Black EC6017 The 17-round Echelon magazine is a sleek and dependable accessory designed for ultimate performance. Its flush-fitting design conceals a generous 17-rounds of 9mm" while numbered witness holes provide quick feedback. Crafted from robust stainless steel" the magazine features a new blacked-out coating" boasting exceptional scratch and wear resistance for long-lasting durability.