Ruger No. 1 RSI International in .243 Win with a 20-inch full-length Mannlicher stock. The falling-block single-shot action with a Tang safety and distinctive quarter-rib. Type: Rifle Action: Single-Shot Caliber: .243 Winchester Capacity: 1 Year introduced: 1966, USA Weight: 80 oz Overall length: 38.5" Status: Discontinued Intended use: Hunting, Field Rifle