A two-week surrender of illegally-held guns has been launched by Merseyside Police.
The campaign is aimed at people who wish to hand over of an antique or unwanted firearms without fear of prosecution.
However detectives will investigate the history and use of them.
In 2003, nearly 500 guns, 70 other weapons and 10,000 rounds of ammunition were handed in to Merseyside Police during a national gun crime amnesty.
In July, the maximum penalty for possession of an illegal firearm increased from 10 years' imprisonment to life.
Det Supt Mike Shaw said the force was "relentless in its approach to tackling gun crime".
He said: "Some people may also have replica and decommissioned firearms in their homes because they have inherited them, or have a genuine interest in collecting military weapons and paraphernalia.
"These weapons could be targeted by those involved in serious and organised crime who may see the opportunities of converting and using them in criminality.
"So if you do own any weapons like this, think long and hard about the potential consequences."
People can surrender weapons at the following police stations - or call 101 for advice:
- Birkenhead police station
- Marsh Lane police station, Bootle (8am-10pm)
- Huyton police station, Lathom Road
- St Helens police station, College Street
- St Anne Street police station, Islington
- Admiral Street in Toxteth