This topic might have a better name.
Person who put this template here can't confirm if the exact name was used in Nightmare, but if it is, wouldn't the "Cyber" be capitalised?
Talk about it here.
The anti-Cyber gun was a weapon used by the punishment platoon led by Alice Ferrin. When fired, the gun produced a red beam which disintegrated Cybermen into thin air. The gun only had a number of shots before it needed to recharge. Also, the Cybermen installed an upgrade which rendered the gun useless. (TV: Nightmare in Silver)