Mec-Gar USA Pistol Magazine, 9MM, 17 Rounds, Fits Ruger P85, Steel, Blued Finish MGRP8517B MEC-GAR magazines meet or exceeded the tolerance guidelines" stringent testing and exacting requirements of military and law enforcement customers around the world. MEC-GAR incorporates the highest level of quality control measures during the manufacturing process and critical dimensions are regularly checked to maintain tolerance specifications.