The 16.5-inch HK417 is the patrol and law enforcement configuration, balancing 7.62x51mm performance with manageable length. The piston-driven system handles the higher port pressures of the larger cartridge more reliably than a direct-impingement design would. Standard NATO STANAG 762 magazines are compatible. The MR762A1 is the US civilian export version of this variant. Type: Rifle Action: Semi-Automatic Caliber: 7.62x51mm Capacity: 10 Year introduced: 2006, Germany Weight: 91.2 oz Overall length: 35.3" Status: Active Military use: Yes Intended use: military, law_enforcement, patrol, dmr