ProMag Rifle Magazine AK-74 5.45X39mm 40 Round Black 1 Pack DuPont Zytel Polymer 40RD. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Specifications for ProMag AK-74 5.45X39mm 40 Round Rifle Magazine: Manufacturer: ProMag Color: Black Fabric/Material: Polymer Magazine Capacity: 40 Round Caliber: 5.45x39mm Gun Model: AK-74 Package Contents: ProMag AK-74 5.45X39mm 40 Round Rifle Magazine What firearm models does the manufacturer say ProMag AK-74 5.45X39mm 40 Round Rifle Magazine is compatible with? The manufacturer says that ProMag AK-74 5.45X39mm 40 Round Rifle Magazine is compatible with AK-74ProMag AKA18-40RD: Rifle Magazine AK-74 5.45X39mm 40 Round Black 1 Pack DuPont Zytel Polymer