Mec-Gar USA Pistol Magazine, 9MM, 15 Rounds, Fits Sig P228, Blued Finish MGP22815B 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.