These magazines are designed with a unique Double Stack to Single Feed (DSSF) transition design for reduced overall height compared to the industry standard. MDT AICS-pattern metal magazines are manufactured from high strength steel, nitrided, and finished inside and outside with Cerakote Elite for ultimate durability, corrosion resistance, and friction reduction.Features :12 RoundsAICS StyleNo Binder PlateCompatible with 6mm Creedmoor, 243WIN, 260 Rem, 6.5 Creedmoor, 7mm-08 Win, 308/7.62x51 NATO, 22 - 250 Rem (will work at a reduced capacity)