Very early 10/22 production with differences in receiver casting and machining compared to later standardized production. The transition from early to late receiver casting is the key dating marker for pre-1972 rifles. Type: Rifle Action: Semi-Auto Caliber: .22 LR Capacity: 10 Year introduced: 1964, USA Weight: 53 oz Overall length: 37.25" Status: Discontinued Intended use: Collecting