Collectors of airsoft period guns can check this Russian M1895 Nagant Revolver CO2 which is now in stock at CWI Airsoft for US$207.06. We're not sure the company behind this product. This revolver, whilst released in 1885 is still in use unti now and for this revolver, it uses the 7.62x38mm R cartridge, but for airsoft it's still the 6mm.