Heym SR21 in 8x57 IS (8mm Mauser), the original German military and hunting cartridge. A heavy-hitting European classic in a traditionally crafted Heym bolt-action. Type: Rifle Action: Bolt-Action Caliber: 8x57 IS Capacity: 5 Year introduced: 2001, Germany Weight: 103 oz Overall length: 41" Status: Active Intended use: hunting, big_game