Telephones are becoming increasingly common. From the late 1870s they have been installed in Government and Military locations by the Royal Engineers. From 1880 onwards there are rich private residences with their own line and they are available for public use at large Post Offices.
Victorian Firearms are very common among the landed gentry, with shotguns being possessed by every farmer for hunting and vermin control. Pistols are more common in towns and cities. The only real restriction to owning one is the price and quality available. There are no cheap imitations but there are American imports and many pistols are ex-service weapons used by the British Army or one of the great companies such as the East India Company.
For more history see Firearms