The haul collected by West Midlands Police include an Uzi, AK47 and a replica of the handgun used by Saddam Hussein.
More than a hundred guns were seized by, or surrendered to, the force in the last 12 months – some modified or handmade.
They are now stored at a secure unit under the supervision of firearm inquiry officers like Neil Corlett and used for training.
Former firearms officer PC Rob Pedley said: “We obtain the guns through a variety of sources. Many are seized but
some are handed in through amnesties.
“Some people have legitimately held licences for rifles and decided to get rid of them. Others we can perhaps connect to crimes or planned crimes.”
The force said that imitation guns, which can be bought cheaply online, can be as dangerous as the real thing. But
Many are seized but some are handed in through amnesties
officers are ready for every situation.
Chief Inspector Paul Minor, head of West Midlands Police firearms unit, said: “Our officers are trained to an exceptionally high standard by experts with many years tactical experience.”