Mec-Gar Pistol Magazine 9mm Luger 20 Round Blued 1 Pack Carbon Steel 20RD. This mag features a high-impact polymer follower heat treated carbon steel tube and a high-impact polymer floor plate that sits flush with the pistol. Specifications for Mec-Gar Smith & Wesson 5900 Series/ 915/ 910/ 659 9mm Luger 20 Round Pistol Magazine: Manufacturer: Mec-Gar Gun Make: Smith & Wesson Gun Model: Smith & Wesson Model 5900 EAA Witness Caliber: 9mm Luger Magazine Capacity: 20 Round Color: Blued Fabric/Material: Polymer Number of Rounds: 20 Package Contents: Mec-Gar Smith & Wesson 5900 Series/ 915/ 910/ 659 9mm Luger 20 Round Pistol Magazine The Mec-Gar USA Inc Mec-gar - Magazine is a quality addition to the Mec-Gar lineup. For more great deals on Pistol Magazines by Mec-Gar please browse our Mec-Gar USA Inc Magazines page. What firearm models does the manufacturer say Mec-Gar Smith & Wesson 5900 Series/ 915/ 910/ 659 9mm Luger 20 Round Pistol Magazine is compatible with? The manufacturer says that Mec-Gar Smith & Wesson 5900 Series/ 915/ 910/ 659 9mm Luger 20 Round Pistol Magazine is compatible with EAA Witness Smith & Wesson Model 5900Mec-Gar MGSW5920B-20RD: Pistol Magazine 9mm Luger 20 Round Blued 1 Pack Carbon Steel