Heckler & Koch Rifle Magazine MR762 7.62mm 20 Round Clear 1 Pack Polymer 20. Factory fresh & hard to find. This is the highest magazine capacity available for the MR762 and HK417 family of firearms. Specifications for Heckler & Koch MR762 7.62mm 20 Round Rifle Magazine: Manufacturer: Heckler & Koch Fabric/Material: Polymer Magazine Capacity: 20 Round Caliber: 7.62x51mm NATO Gun Make: Heckler & Koch Gun Model: Heckler & Koch MR762 Gun Type: Rifle Quantity: 1 Package Contents: Heckler & Koch MR762 7.62mm 20 Round Rifle Magazine What firearm models does the manufacturer say Heckler & Koch MR762 7.62mm 20 Round Rifle Magazine is compatible with? The manufacturer says that Heckler & Koch MR762 7.62mm 20 Round Rifle Magazine is compatible with Heckler & Koch MR762Heckler & Koch 234708S: Rifle Magazine MR762 7.62mm 20 Round Clear 1 Pack Polymer 20