Two balaclava-clad men armed with a handgun and knife threatened a man who woke up to find them in his house in Cranleigh Gardens on Sunday.
They stole £200 in cash and his iPhone during the aggravated burglary at about 2.45am.
The pair then fled the property and ran along Fountains Road towards Culverhouse Road.
Det Con Ben Stone said: “This was a terrifying ordeal for the victim who genuinely feared that he would be harmed if he did not hand over his belongings.
“I would urge anyone with information about this crime to come forward and talk to us. Even the smallest pieces of information, which may not seem relevant, could be important.”
The offender armed with the handgun is described as being a white male, around five feet six inches tall, dressed in black clothing and wearing a balaclava.
The second offender – armed with a kitchen knife – was a black male, around six feet two inches tall, wearing dark
clothing and a balaclava.
Call Det Con Stone on 01582 394471 with information.