UNIT's personnel have a wide range of weaponry to call on, some custom-made to combat specific threats. Among these are special ammunition described by the Brigadier in "Battlefield" as armour-piercing rounds with a solid core and Teflon coating which "could go through a Dalek". Other munitions include explosive rounds for Yetis, other armour-piercing rounds for robots, and gold-tipped rounds for use against the Cybermen (as well as silver bullets as suggested by the Doctor), and rad-steel coated bullets to neutralise Sontaran anti-bullet fields that target copper.