The Merkel RX Helix in .308 Winchester is a modular straight-pull bolt rifle featuring the Helix rotating bolt head, which allows caliber changes with a simple tool-free procedure. It combines traditional German gunmaking aesthetics with modern modular engineering in a lightweight hunting package. Type: Bolt-Action Rifle Action: Straight-Pull Bolt-Action Caliber: .308 Win Capacity: 5 Year introduced: 2013, Germany Weight: 6.6 oz Overall length: 41.5" Status: Active Intended use: Hunting, Safari