Cyber-gun

Cyber-guns or Cyberguns were weapons utilised by Cybermen from Mondas. (PROSE: Doctor Who and the Cybermen)

Design and evolution
The earliest Cyber-guns date back to when the Cybermen invaded Snowcap Base. (TV: The Tenth Planet) 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)

The Cybermen landing force which invaded Snowcap base in 1986 had very different weapons, resembling large, cumbersome sun lamps held at their mid-sections. (TV: The Tenth Planet)

In 2526, a group of Cybermen who captured Briggs' freighter, (TV: Earthshock) and another group who were transported to the Death Zone on Gallifrey, used the same guns as the Cybermen in 1985. The latter took on a Raston Warrior Robot, but these guns had little to no effect on it. (TV: The Five Doctors)

Other information
On the Moon's surface in 2070, the Cybermen did not use hand-held anti-personnel weapons, but did employ a cannon-sized X-ray laser, sometimes referred to as a Cyber-cannon. (TV: The Moonbase/PROSE: Doctor Who and the Cybermen)

The Cybermen from Pete's World contained Cyber wrist blasters. They also used energy blasters originally used by the Preachers, modified to disrupt Dalek shields. (TV: Doomsday) Some of the Cybermen of the Cyber-Legions used similar looking guns. (TV: A Good Man Goes to War)