MDT Magazine, 6MM ARC, 12 Rounds, Black, Fits Short Action AICS Pattern 105627-BLK 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.