Airgun Home | Shooting Diary | My Airguns | Airgun Safety | Slavia 622 Restoration CZ Slavia 631 Manufacturer: Ceska Zbrojovka, Uhersky Brod Dates of Manufacture: 1975-2003 Power Plant: Spring Piston Cocking Method: Break-Barrel Calibre: .177 (4.5mm) Manufacturer-Rated Muzzle Velocity: 440fps (that's what they SAY...) CZ Slavia 622 Manufacturer: Ceska Zbrojovka, Uhersky Brod Dates of Manufacture: 1958-1965 Power Plant: Spring Piston Cocking Method: Break-Barrel Calibre: .22 (5.5mm) Manufacturer-Rated Muzzle Velocity: Information not available