The Proof Research Switch Barrel system allows a single Proof action to accept multiple carbon-wrapped barrel assemblies in different calibers, enabling rapid caliber conversion in the field. The .308 Winchester 24-inch barrel is the standard starting configuration. The switch barrel mechanism requires no gunsmith fitting — barrel swaps are completed with a barrel wrench in under two minutes, making a single action serve multiple hunting and competition purposes. Type: Rifle Action: Bolt-Action Caliber: .308 Winchester Capacity: 5 Year introduced: 2020, USA Weight: 150 oz Overall length: 43.5" Status: Active Intended use: Hunting / Long-Range Precision