Design and evolution Edit
The earliest Cyber-guns date back to when the Cybermen invaded Snowcap Base (see below). The Cybermen that arrived on the Moonbase in 2070 had smaller and slimmer metal guns which could fit neatly into their big and bulky chest units. (TV: The Moonbase)
During the late 20th century Cybermen invasion, Cybermen used standard silver guns, about three feet long, designed for two hands. The guns produced a "negative effect", not unlike that made by many versions of the Daleks' gunsticks. (TV: The Invasion)
In 1985, the Cybermen in the London sewers, as well as other Cybermen on the planet Telos, used a different, smaller weapon, easier to use with one hand. This produced a green, halo-shaped discharge. It could easily kill a Cyberman. (TV: Attack of the Cybermen)
In 2526, a group of Cybermen who captured Briggs' freighter (TV: Earthshock) and another who were transported to the Death Zone on Gallifrey, (TV: The Five Doctors) used the same guns as the Cybermen in 1985.