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.Features :For GLOCK 1718 RoundAnti-Friction CoatingFlush FitFactory Magazine Catch Does Not Need to be ReplacedMagazine Holds One Extra Round Compared to the OEM