Product Number: MF10019Standard 10-round factory magazine for your Glock 19 pistol, ambidextrous friendly Generation 4 model (backwards compatible with all previous models). Compatible with many pistol caliber carbines such as the Ruger PC 9 carbine and the PWS PCC CarbineFits compact frame 9mm Glock double-stack pistolsGen4 dual-notched magazine compatible with left handed Gen4 Glock pistols and suitable for previous generation Glock pistols as well.Polymer construction with steel skeletonOriginal Glock Factory Magazine