this is a unit official machine gun use by the brigadier
these props and guns are owned by either the BBC, the relevant prop company or most commonly the armourer that supplied them depending on a variety of factors.
appeared in the series or specials and as been handled by many villains or Monsters in eatch profile even enermies to such as or if the actor as passed away their props are set straight to their next of Kin such as Roger Delagro and Kate O,Mara to or the Soliders who have been in episodes The Caves of Androzani
U.N.I.T. Have used various types of weapons over the years. In the 21st century standard weaponry used is often Heckler and Koch G36 assault rifles, M4 assault rifles and carbines as well as Sig Sauer p226 pistols, heavy weaponry includes tanks, armoured fighting vehicles, AT4 missiles, stinger missiles and grenades, police batons are also carried for unarmed hostile individuals and hand to hand combat.
this pistol is not used by martha jones