Revolvers chambered for Flaubert (caliber - 4 mm) according to the current legislation are not firearms and can be sold freely. At the same time, the appearance of revolvers is so realistic that at first glance it is elementary to take it for combat! Revolvers of the 431 series with a 4 m Flaubert cartridge from the Czech company Alfa are designed for training and entertaining shooting, as well as practicing the skills of aimed shooting at sports targets. The Model 431 is equipped with a drum for 9 cartridges, loading of which is carried out by folding to the left side, and has a barrel of shortened length. The 431 series, as well as the 441, received one small but very important improvement – an adjustable rear sight, thanks to which the revolver can be shot at a certain distance.