The Aker Leather 523 D.M.S. Twin open top double magazine pouch is was the original dual carry combo pouch on the market. Contructed from the highest grade of vegetable tanned leather, the D.M.S. Twin features 1 solid brass tension screw so the wearer can adjust the security or speed of draw. It fits two spare magazines from Colt single stack .45 magazines to Smith & Wesson M&P 9mm or .40 caliber magazines.