The Winchester Model 100 was a gas-operated semi-automatic hunting rifle with a detachable box magazine. Designed to offer the power of a bolt-action with semi-automatic follow-up shots. Recalled in 1972 due to a safety issue with the firing pin. Type: Semi-Auto Rifle Action: SA Caliber: .308 Win Capacity: 4 Year introduced: 1961, USA Weight: 79 oz Overall length: 42.5" Status: Discontinued Intended use: Hunting